10557021 has 8 divisors (see below), whose sum is σ = 14163040. Its totient is φ = 6994512.

The previous prime is 10556981. The next prime is 10557031. The reversal of 10557021 is 12075501.

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

It is not a de Polignac number, because 10557021 - 2⁷ = 10556893 is a prime.

It is a super-2 number, since 2×10557021² = 222901384788882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10557031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10306 + ... + 11283.

It is an arithmetic number, because the mean of its divisors is an integer number (1770380).

Almost surely, 2^10557021 is an apocalyptic number.

It is an amenable number.

10557021 is a deficient number, since it is larger than the sum of its proper divisors (3606019).

10557021 is a wasteful number, since it uses less digits than its factorization.

10557021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21755.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 10557021 is about 3249.1569675841. The cubic root of 10557021 is about 219.3716298051.

The spelling of 10557021 in words is "ten million, five hundred fifty-seven thousand, twenty-one".