1315402402 has 4 divisors (see below), whose sum is σ = 1973103606. Its totient is φ = 657701200.

The previous prime is 1315402399. The next prime is 1315402409. The reversal of 1315402402 is 2042045131.

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., 799249441 + 516152961 = 28271^2 + 22719^2 .

It is not an unprimeable number, because it can be changed into a prime (1315402409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328850599 + ... + 328850602.

Almost surely, 2^1315402402 is an apocalyptic number.

1315402402 is a deficient number, since it is larger than the sum of its proper divisors (657701204).

1315402402 is an equidigital number, since it uses as much as digits as its factorization.

1315402402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657701203.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1315402402 is about 36268.4766980914. The cubic root of 1315402402 is about 1095.6862463692.

Adding to 1315402402 its reverse (2042045131), we get a palindrome (3357447533).

The spelling of 1315402402 in words is "one billion, three hundred fifteen million, four hundred two thousand, four hundred two".