1265572940 has 24 divisors (see below), whose sum is σ = 2668741152. Its totient is φ = 504126720.

The previous prime is 1265572909. The next prime is 1265572991. The reversal of 1265572940 is 492755621.

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, 126464 + ... + 136103.

It is an arithmetic number, because the mean of its divisors is an integer number (111197548).

Almost surely, 2^1265572940 is an apocalyptic number.

1265572940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265572940 is an abundant number, since it is smaller than the sum of its proper divisors (1403168212).

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

1265572940 is a wasteful number, since it uses less digits than its factorization.

1265572940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262817 (or 262815 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 1265572940 is about 35574.8919885922. The cubic root of 1265572940 is about 1081.6723462161.

The spelling of 1265572940 in words is "one billion, two hundred sixty-five million, five hundred seventy-two thousand, nine hundred forty".