1311000402 has 32 divisors (see below), whose sum is σ = 2667458304. Its totient is φ = 429488000.

The previous prime is 1311000371. The next prime is 1311000451. The reversal of 1311000402 is 2040001131.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 75127 + ... + 90917.

It is an arithmetic number, because the mean of its divisors is an integer number (83358072).

Almost surely, 2^1311000402 is an apocalyptic number.

1311000402 is an abundant number, since it is smaller than the sum of its proper divisors (1356457902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311000402 is a wasteful number, since it uses less digits than its factorization.

1311000402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16034.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1311000402 is about 36207.7395317631. The cubic root of 1311000402 is about 1094.4626407832.

Adding to 1311000402 its reverse (2040001131), we get a palindrome (3351001533).

The spelling of 1311000402 in words is "one billion, three hundred eleven million, four hundred two", and thus it is an aban number.