1056210661 has 8 divisors (see below), whose sum is σ = 1162427904. Its totient is φ = 951693120.

The previous prime is 1056210643. The next prime is 1056210671. The reversal of 1056210661 is 1660126501.

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 1056210661 - 2⁹ = 1056210149 is a prime.

It is a super-2 number, since 2×1056210661² = 2231161920820113842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056210601) 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, 423621 + ... + 426106.

It is an arithmetic number, because the mean of its divisors is an integer number (145303488).

Almost surely, 2^1056210661 is an apocalyptic number.

1056210661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1056210661 is a deficient number, since it is larger than the sum of its proper divisors (106217243).

1056210661 is a wasteful number, since it uses less digits than its factorization.

1056210661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849851.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1056210661 is about 32499.3947789801. The cubic root of 1056210661 is about 1018.3963847505.

The spelling of 1056210661 in words is "one billion, fifty-six million, two hundred ten thousand, six hundred sixty-one".