1264521506 has 16 divisors (see below), whose sum is σ = 2027133216. Its totient is φ = 589505856.

The previous prime is 1264521493. The next prime is 1264521547. The reversal of 1264521506 is 6051254621.

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, 170156 + ... + 177431.

It is an arithmetic number, because the mean of its divisors is an integer number (126695826).

Almost surely, 2^1264521506 is an apocalyptic number.

1264521506 is a deficient number, since it is larger than the sum of its proper divisors (762611710).

1264521506 is a wasteful number, since it uses less digits than its factorization.

1264521506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347713.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1264521506 is about 35560.1111640557. Note that the first 4 decimals coincide. The cubic root of 1264521506 is about 1081.3727132334.

The spelling of 1264521506 in words is "one billion, two hundred sixty-four million, five hundred twenty-one thousand, five hundred six".