1231457451 has 16 divisors (see below), whose sum is σ = 1900262400. Its totient is φ = 694781568.

The previous prime is 1231457443. The next prime is 1231457453. The reversal of 1231457451 is 1547541321.

It is not a de Polignac number, because 1231457451 - 2³ = 1231457443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231457453) 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, 369486 + ... + 372803.

It is an arithmetic number, because the mean of its divisors is an integer number (118766400).

Almost surely, 2^1231457451 is an apocalyptic number.

1231457451 is a deficient number, since it is larger than the sum of its proper divisors (668804949).

1231457451 is an equidigital number, since it uses as much as digits as its factorization.

1231457451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742378.

The product of its digits is 16800, while the sum is 33.

The square root of 1231457451 is about 35092.1280488944. The cubic root of 1231457451 is about 1071.8642932073.

Adding to 1231457451 its reverse (1547541321), we get a palindrome (2778998772).

The spelling of 1231457451 in words is "one billion, two hundred thirty-one million, four hundred fifty-seven thousand, four hundred fifty-one".