1056551 has 8 divisors (see below), whose sum is σ = 1119744. Its totient is φ = 994840.

The previous prime is 1056541. The next prime is 1056563. The reversal of 1056551 is 1556501.

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

It is a cyclic number.

It is not a de Polignac number, because 1056551 - 2¹⁴ = 1040167 is a prime.

It is a super-2 number, since 2×1056551² = 2232600031202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310 + ... + 1956.

It is an arithmetic number, because the mean of its divisors is an integer number (139968).

2^1056551 is an apocalyptic number.

1056551 is a deficient number, since it is larger than the sum of its proper divisors (63193).

1056551 is an equidigital number, since it uses as much as digits as its factorization.

1056551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1056551 is about 1027.8866669045. The cubic root of 1056551 is about 101.8505757751.

The spelling of 1056551 in words is "one million, fifty-six thousand, five hundred fifty-one".