1265064500 has 48 divisors (see below), whose sum is σ = 3157609728. Its totient is φ = 433735200.

The previous prime is 1265064499. The next prime is 1265064539. The reversal of 1265064500 is 54605621.

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, 177224 + ... + 184223.

It is an arithmetic number, because the mean of its divisors is an integer number (65783536).

Almost surely, 2^1265064500 is an apocalyptic number.

1265064500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265064500 is an abundant number, since it is smaller than the sum of its proper divisors (1892545228).

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

1265064500 is a wasteful number, since it uses less digits than its factorization.

1265064500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361473 (or 361461 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1265064500 is about 35567.7452195103. The cubic root of 1265064500 is about 1081.5274739779.

The spelling of 1265064500 in words is "one billion, two hundred sixty-five million, sixty-four thousand, five hundred".