1231745604 has 24 divisors (see below), whose sum is σ = 3025340640. Its totient is φ = 388972224.

The previous prime is 1231745597. The next prime is 1231745617. The reversal of 1231745604 is 4065471321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2700969 + ... + 2701424.

It is an arithmetic number, because the mean of its divisors is an integer number (126055860).

Almost surely, 2^1231745604 is an apocalyptic number.

It is an amenable number.

1231745604 is an abundant number, since it is smaller than the sum of its proper divisors (1793595036).

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

1231745604 is a wasteful number, since it uses less digits than its factorization.

1231745604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5402419 (or 5402417 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1231745604 is about 35096.2334731236. The cubic root of 1231745604 is about 1071.9478897685.

It can be divided in two parts, 123174 and 5604, that added together give a triangular number (128778 = T₅₀₇).

The spelling of 1231745604 in words is "one billion, two hundred thirty-one million, seven hundred forty-five thousand, six hundred four".