1131564120 has 64 divisors (see below), whose sum is σ = 3542296320. Its totient is φ = 288630144.

The previous prime is 1131564107. The next prime is 1131564169. The reversal of 1131564120 is 214651311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 202234 + ... + 207753.

It is an arithmetic number, because the mean of its divisors is an integer number (55348380).

Almost surely, 2^1131564120 is an apocalyptic number.

1131564120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131564120 is an abundant number, since it is smaller than the sum of its proper divisors (2410732200).

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

1131564120 is a wasteful number, since it uses less digits than its factorization.

1131564120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410024 (or 410020 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1131564120 is about 33638.7294647108. The cubic root of 1131564120 is about 1042.0607929675.

The spelling of 1131564120 in words is "one billion, one hundred thirty-one million, five hundred sixty-four thousand, one hundred twenty".