1264608331 has 4 divisors (see below), whose sum is σ = 1445266672. Its totient is φ = 1083949992.

The previous prime is 1264608277. The next prime is 1264608337. The reversal of 1264608331 is 1338064621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1338064621 = 167 ⋅8012363.

It is a cyclic number.

It is not a de Polignac number, because 1264608331 - 2¹⁹ = 1264084043 is a prime.

It is a super-2 number, since 2×1264608331² = 3198468461669211122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264608337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90329160 + ... + 90329173.

It is an arithmetic number, because the mean of its divisors is an integer number (361316668).

Almost surely, 2^1264608331 is an apocalyptic number.

1264608331 is a deficient number, since it is larger than the sum of its proper divisors (180658341).

1264608331 is an equidigital number, since it uses as much as digits as its factorization.

1264608331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180658340.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1264608331 is about 35561.3319632434. The cubic root of 1264608331 is about 1081.3974625257.

The spelling of 1264608331 in words is "one billion, two hundred sixty-four million, six hundred eight thousand, three hundred thirty-one".