1231404501 has 16 divisors (see below), whose sum is σ = 1660824000. Its totient is φ = 811496448.

The previous prime is 1231404481. The next prime is 1231404533. The reversal of 1231404501 is 1054041321.

It is not a de Polignac number, because 1231404501 - 2⁹ = 1231403989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231400501) 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, 142630 + ... + 151016.

It is an arithmetic number, because the mean of its divisors is an integer number (103801500).

Almost surely, 2^1231404501 is an apocalyptic number.

It is an amenable number.

1231404501 is a deficient number, since it is larger than the sum of its proper divisors (429419499).

1231404501 is a wasteful number, since it uses less digits than its factorization.

1231404501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8948.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1231404501 is about 35091.3735980796. The cubic root of 1231404501 is about 1071.8489303737.

Adding to 1231404501 its reverse (1054041321), we get a palindrome (2285445822).

The spelling of 1231404501 in words is "one billion, two hundred thirty-one million, four hundred four thousand, five hundred one".