1220131 has 4 divisors (see below), whose sum is σ = 1331064. Its totient is φ = 1109200.

The previous prime is 1220099. The next prime is 1220147. The reversal of 1220131 is 1310221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220131 - 2⁵ = 1220099 is a prime.

It is a super-2 number, since 2×1220131² = 2977439314322, which contains 22 as substring.

It is a Duffinian number.

1220131 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1220171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55450 + ... + 55471.

It is an arithmetic number, because the mean of its divisors is an integer number (332766).

2^1220131 is an apocalyptic number.

1220131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220131 is a deficient number, since it is larger than the sum of its proper divisors (110933).

1220131 is a wasteful number, since it uses less digits than its factorization.

1220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110932.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1220131 is about 1104.5954010406. The cubic root of 1220131 is about 106.8567973970.

Adding to 1220131 its reverse (1310221), we get a palindrome (2530352).

The spelling of 1220131 in words is "one million, two hundred twenty thousand, one hundred thirty-one".