1264321402 has 4 divisors (see below), whose sum is σ = 1896482106. Its totient is φ = 632160700.

The previous prime is 1264321379. The next prime is 1264321417. The reversal of 1264321402 is 2041234621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1042579521 + 221741881 = 32289^2 + 14891^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316080349 + ... + 316080352.

Almost surely, 2^1264321402 is an apocalyptic number.

1264321402 is a deficient number, since it is larger than the sum of its proper divisors (632160704).

1264321402 is an equidigital number, since it uses as much as digits as its factorization.

1264321402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632160703.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1264321402 is about 35557.2974507344. The cubic root of 1264321402 is about 1081.3156696747.

The spelling of 1264321402 in words is "one billion, two hundred sixty-four million, three hundred twenty-one thousand, four hundred two".