1121651604 has 48 divisors (see below), whose sum is σ = 2928945600. Its totient is φ = 371189088.

The previous prime is 1121651593. The next prime is 1121651677. The reversal of 1121651604 is 4061561211.

1121651604 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 6 + 51 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22347 + ... + 52370.

It is an arithmetic number, because the mean of its divisors is an integer number (61019700).

Almost surely, 2^1121651604 is an apocalyptic number.

It is an amenable number.

1121651604 is an abundant number, since it is smaller than the sum of its proper divisors (1807293996).

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

1121651604 is a wasteful number, since it uses less digits than its factorization.

1121651604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74869 (or 74861 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1121651604 is about 33491.0675255358. The cubic root of 1121651604 is about 1039.0090425121.

The spelling of 1121651604 in words is "one billion, one hundred twenty-one million, six hundred fifty-one thousand, six hundred four".