1264572089 has 12 divisors (see below), whose sum is σ = 1399332900. Its totient is φ = 1141879200.

The previous prime is 1264572077. The next prime is 1264572107. The reversal of 1264572089 is 9802754621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 491287225 + 773284864 = 22165^2 + 27808^2 .

It is not a de Polignac number, because 1264572089 - 2¹⁶ = 1264506553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264572689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17042 + ... + 53099.

It is an arithmetic number, because the mean of its divisors is an integer number (116611075).

Almost surely, 2^1264572089 is an apocalyptic number.

It is an amenable number.

1264572089 is a deficient number, since it is larger than the sum of its proper divisors (134760811).

1264572089 is a wasteful number, since it uses less digits than its factorization.

1264572089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70312 (or 70301 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1264572089 is about 35560.8223892530. The cubic root of 1264572089 is about 1081.3871319540.

The spelling of 1264572089 in words is "one billion, two hundred sixty-four million, five hundred seventy-two thousand, eighty-nine".