1961100 has 54 divisors (see below), whose sum is σ = 6149780. Its totient is φ = 522720.

The previous prime is 1961093. The next prime is 1961107. The reversal of 1961100 is 11691.

It is an interprime number because it is at equal distance from previous prime (1961093) and next prime (1961107).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (1961107) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 190 + ... + 1989.

2^1961100 is an apocalyptic number.

1961100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1961100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3074890).

1961100 is an abundant number, since it is smaller than the sum of its proper divisors (4188680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961100 is a wasteful number, since it uses less digits than its factorization.

1961100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1961100 is about 1400.3928020381. The cubic root of 1961100 is about 125.1699022944.

Adding to 1961100 its reverse (11691), we get a palindrome (1972791).

It can be divided in two parts, 196 and 1100, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1961100 in words is "one million, nine hundred sixty-one thousand, one hundred".