1231012451 has 8 divisors (see below), whose sum is σ = 1297297680. Its totient is φ = 1164876768.

The previous prime is 1231012441. The next prime is 1231012457. The reversal of 1231012451 is 1542101321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231012451 - 2¹⁰ = 1231011427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231012457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20276 + ... + 53601.

It is an arithmetic number, because the mean of its divisors is an integer number (162162210).

Almost surely, 2^1231012451 is an apocalyptic number.

1231012451 is a deficient number, since it is larger than the sum of its proper divisors (66285229).

1231012451 is an equidigital number, since it uses as much as digits as its factorization.

1231012451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74773.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1231012451 is about 35085.7870226677. The cubic root of 1231012451 is about 1071.7351678701.

Adding to 1231012451 its reverse (1542101321), we get a palindrome (2773113772).

The spelling of 1231012451 in words is "one billion, two hundred thirty-one million, twelve thousand, four hundred fifty-one".