1055620521 has 12 divisors (see below), whose sum is σ = 1525329520. Its totient is φ = 703495800.

The previous prime is 1055620469. The next prime is 1055620523. The reversal of 1055620521 is 1250265501.

1055620521 is a `hidden beast` number, since 10 + 5 + 5 + 620 + 5 + 21 = 666.

It is not a de Polignac number, because 1055620521 - 2⁹ = 1055620009 is a prime.

It is a super-2 number, since 2×1055620521² = 2228669368712622882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1055620523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7746 + ... + 46596.

Almost surely, 2^1055620521 is an apocalyptic number.

It is an amenable number.

1055620521 is a deficient number, since it is larger than the sum of its proper divisors (469708999).

1055620521 is a wasteful number, since it uses less digits than its factorization.

1055620521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41876 (or 41873 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1055620521 is about 32490.3142644081. The cubic root of 1055620521 is about 1018.2066787788.

The spelling of 1055620521 in words is "one billion, fifty-five million, six hundred twenty thousand, five hundred twenty-one".