1311040402 has 16 divisors (see below), whose sum is σ = 2264657472. Its totient is φ = 557584560.

The previous prime is 1311040387. The next prime is 1311040427. The reversal of 1311040402 is 2040401131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355593 + ... + 359260.

It is an arithmetic number, because the mean of its divisors is an integer number (141541092).

Almost surely, 2^1311040402 is an apocalyptic number.

1311040402 is a deficient number, since it is larger than the sum of its proper divisors (953617070).

1311040402 is a wasteful number, since it uses less digits than its factorization.

1311040402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714993.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1311040402 is about 36208.2918956418. The cubic root of 1311040402 is about 1094.4737717384.

Adding to 1311040402 its reverse (2040401131), we get a palindrome (3351441533).

The spelling of 1311040402 in words is "one billion, three hundred eleven million, forty thousand, four hundred two".