1056621 has 8 divisors (see below), whose sum is σ = 1423744. Its totient is φ = 696960.

The previous prime is 1056617. The next prime is 1056623. The reversal of 1056621 is 1266501.

It is a happy number.

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

It is not a de Polignac number, because 1056621 - 2² = 1056617 is a prime.

It is a super-2 number, since 2×1056621² = 2232895875282, which contains 22 as substring.

It is a Duffinian number.

1056621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056623) 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, 1525 + ... + 2106.

It is an arithmetic number, because the mean of its divisors is an integer number (177968).

2^1056621 is an apocalyptic number.

It is an amenable number.

1056621 is a deficient number, since it is larger than the sum of its proper divisors (367123).

1056621 is an equidigital number, since it uses as much as digits as its factorization.

1056621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1056621 is about 1027.9207167870. The cubic root of 1056621 is about 101.8528250379.

The spelling of 1056621 in words is "one million, fifty-six thousand, six hundred twenty-one".