1264272517 has 8 divisors (see below), whose sum is σ = 1291471776. Its totient is φ = 1237358352.

The previous prime is 1264272509. The next prime is 1264272551. The reversal of 1264272517 is 7152724621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1264272517 - 2³ = 1264272509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264272577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62298 + ... + 80059.

It is an arithmetic number, because the mean of its divisors is an integer number (161433972).

Almost surely, 2^1264272517 is an apocalyptic number.

It is an amenable number.

1264272517 is a deficient number, since it is larger than the sum of its proper divisors (27199259).

1264272517 is a wasteful number, since it uses less digits than its factorization.

1264272517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142547.

The product of its digits is 47040, while the sum is 37.

The square root of 1264272517 is about 35556.6100324539. The cubic root of 1264272517 is about 1081.3017331346.

The spelling of 1264272517 in words is "one billion, two hundred sixty-four million, two hundred seventy-two thousand, five hundred seventeen".