1264532409 has 24 divisors (see below), whose sum is σ = 2090018112. Its totient is φ = 721712160.

The previous prime is 1264532383. The next prime is 1264532431. The reversal of 1264532409 is 9042354621.

It is a happy number.

1264532409 is a `hidden beast` number, since 1 + 2 + 645 + 3 + 2 + 4 + 0 + 9 = 666.

It is not a de Polignac number, because 1264532409 - 2¹¹ = 1264530361 is a prime.

It is a super-2 number, since 2×1264532409² = 3198084426822686562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1264531409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41974 + ... + 65504.

It is an arithmetic number, because the mean of its divisors is an integer number (87084088).

Almost surely, 2^1264532409 is an apocalyptic number.

It is an amenable number.

1264532409 is a deficient number, since it is larger than the sum of its proper divisors (825485703).

1264532409 is a wasteful number, since it uses less digits than its factorization.

1264532409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24397 (or 24394 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1264532409 is about 35560.2644675205. The cubic root of 1264532409 is about 1081.3758211739.

It can be divided in two parts, 12645 and 32409, that added together give a palindrome (45054).

The spelling of 1264532409 in words is "one billion, two hundred sixty-four million, five hundred thirty-two thousand, four hundred nine".