1061557120 has 64 divisors (see below), whose sum is σ = 2733020640. Its totient is φ = 391956480.

The previous prime is 1061557109. The next prime is 1061557127. The reversal of 1061557120 is 217551601.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1061557120² = 2253807038045388800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061557127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55476 + ... + 72115.

Almost surely, 2^1061557120 is an apocalyptic number.

1061557120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1061557120 is an abundant number, since it is smaller than the sum of its proper divisors (1671463520).

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

1061557120 is a wasteful number, since it uses less digits than its factorization.

1061557120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127623 (or 127611 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 1061557120 is about 32581.5456969125. The cubic root of 1061557120 is about 1020.1118421511. Note that the first 3 decimals are identical.

The spelling of 1061557120 in words is "one billion, sixty-one million, five hundred fifty-seven thousand, one hundred twenty".