1051990 has 8 divisors (see below), whose sum is σ = 1893600. Its totient is φ = 420792.

The previous prime is 1051987. The next prime is 1051991. The reversal of 1051990 is 991501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1051990² = 2213365920200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051991) 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, 52590 + ... + 52609.

It is an arithmetic number, because the mean of its divisors is an integer number (236700).

2^1051990 is an apocalyptic number.

1051990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1051990 is a deficient number, since it is larger than the sum of its proper divisors (841610).

1051990 is a wasteful number, since it uses less digits than its factorization.

1051990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105206.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 1051990 is about 1025.6656375252. The cubic root of 1051990 is about 101.7038055960.

It can be divided in two parts, 10519 and 90, that added together give a square (10609 = 103²).

The spelling of 1051990 in words is "one million, fifty-one thousand, nine hundred ninety".