1311442001 has 4 divisors (see below), whose sum is σ = 1311564132. Its totient is φ = 1311319872.

The previous prime is 1311441979. The next prime is 1311442021. The reversal of 1311442001 is 1002441131.

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 2 ways, for example, as 1308702976 + 2739025 = 36176^2 + 1655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311442001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311442021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43220 + ... + 67013.

It is an arithmetic number, because the mean of its divisors is an integer number (327891033).

Almost surely, 2^1311442001 is an apocalyptic number.

It is an amenable number.

1311442001 is a deficient number, since it is larger than the sum of its proper divisors (122131).

1311442001 is a wasteful number, since it uses less digits than its factorization.

1311442001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122130.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1311442001 is about 36213.8371482504. The cubic root of 1311442001 is about 1094.5855137054.

Adding to 1311442001 its reverse (1002441131), we get a palindrome (2313883132).

The spelling of 1311442001 in words is "one billion, three hundred eleven million, four hundred forty-two thousand, one".