1061921520 has 120 divisors (see below), whose sum is σ = 3890523312. Its totient is φ = 257433600.

The previous prime is 1061921479. The next prime is 1061921537. The reversal of 1061921520 is 251291601.

1061921520 is a `hidden beast` number, since 1 + 0 + 619 + 21 + 5 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×1061921520² = 2255354629278220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59121 + ... + 74960.

Almost surely, 2^1061921520 is an apocalyptic number.

1061921520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1061921520 is an abundant number, since it is smaller than the sum of its proper divisors (2828601792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1061921520 is a wasteful number, since it uses less digits than its factorization.

1061921520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134111 (or 134102 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1061921520 is about 32587.1373397542. The cubic root of 1061921520 is about 1020.2285531668.

The spelling of 1061921520 in words is "one billion, sixty-one million, nine hundred twenty-one thousand, five hundred twenty".