1264293121 has 16 divisors (see below), whose sum is σ = 1556924544. Its totient is φ = 999759744.

The previous prime is 1264293109. The next prime is 1264293133. The reversal of 1264293121 is 1213924621.

It is an interprime number because it is at equal distance from previous prime (1264293109) and next prime (1264293133).

It is a cyclic number.

It is not a de Polignac number, because 1264293121 - 2⁷ = 1264292993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264290121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250206 + ... + 255208.

It is an arithmetic number, because the mean of its divisors is an integer number (97307784).

Almost surely, 2^1264293121 is an apocalyptic number.

It is an amenable number.

1264293121 is a deficient number, since it is larger than the sum of its proper divisors (292631423).

1264293121 is a wasteful number, since it uses less digits than its factorization.

1264293121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800.

The product of its digits is 5184, while the sum is 31.

The square root of 1264293121 is about 35556.8997664307. The cubic root of 1264293121 is about 1081.3076071371.

The spelling of 1264293121 in words is "one billion, two hundred sixty-four million, two hundred ninety-three thousand, one hundred twenty-one".