1312502135 has 16 divisors (see below), whose sum is σ = 1820232000. Its totient is φ = 889886976.

The previous prime is 1312502131. The next prime is 1312502137. The reversal of 1312502135 is 5312052131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1312502135 - 2² = 1312502131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312502135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312502131) 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, 207560 + ... + 213789.

It is an arithmetic number, because the mean of its divisors is an integer number (113764500).

Almost surely, 2^1312502135 is an apocalyptic number.

1312502135 is a deficient number, since it is larger than the sum of its proper divisors (507729865).

1312502135 is an equidigital number, since it uses as much as digits as its factorization.

1312502135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421450.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1312502135 is about 36228.4713312610. The cubic root of 1312502135 is about 1094.8803786398.

Adding to 1312502135 its reverse (5312052131), we get a palindrome (6624554266).

The spelling of 1312502135 in words is "one billion, three hundred twelve million, five hundred two thousand, one hundred thirty-five".