1055505021 has 16 divisors (see below), whose sum is σ = 1436455680. Its totient is φ = 689209920.

The previous prime is 1055505007. The next prime is 1055505037. The reversal of 1055505021 is 1205055501.

It is not a de Polignac number, because 1055505021 - 2⁷ = 1055504893 is a prime.

It is a super-2 number, since 2×1055505021² = 2228181698712420882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1055504982 and 1055505000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055505041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31671 + ... + 55803.

It is an arithmetic number, because the mean of its divisors is an integer number (89778480).

Almost surely, 2^1055505021 is an apocalyptic number.

It is an amenable number.

1055505021 is a deficient number, since it is larger than the sum of its proper divisors (380950659).

1055505021 is a wasteful number, since it uses less digits than its factorization.

1055505021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24436.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 1055505021 is about 32488.5367629876. The cubic root of 1055505021 is about 1018.1695419610.

The spelling of 1055505021 in words is "one billion, fifty-five million, five hundred five thousand, twenty-one".