1231064401 has 16 divisors (see below), whose sum is σ = 1526031360. Its totient is φ = 968901120.

The previous prime is 1231064399. The next prime is 1231064423. The reversal of 1231064401 is 1044601321.

It is a cyclic number.

It is not a de Polignac number, because 1231064401 - 2¹ = 1231064399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231064431) 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, 121281 + ... + 131038.

It is an arithmetic number, because the mean of its divisors is an integer number (95376960).

Almost surely, 2^1231064401 is an apocalyptic number.

It is an amenable number.

1231064401 is a deficient number, since it is larger than the sum of its proper divisors (294966959).

1231064401 is a wasteful number, since it uses less digits than its factorization.

1231064401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252384.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1231064401 is about 35086.5273431270. The cubic root of 1231064401 is about 1071.7502437693.

Adding to 1231064401 its reverse (1044601321), we get a palindrome (2275665722).

The spelling of 1231064401 in words is "one billion, two hundred thirty-one million, sixty-four thousand, four hundred one".