1231464257 has 4 divisors (see below), whose sum is σ = 1248808896. Its totient is φ = 1214119620.

The previous prime is 1231464251. The next prime is 1231464259. The reversal of 1231464257 is 7524641321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7524641321 = 16879 ⋅445799.

It is a cyclic number.

It is not a de Polignac number, because 1231464257 - 2⁸ = 1231464001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231464251) 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, 8672213 + ... + 8672354.

It is an arithmetic number, because the mean of its divisors is an integer number (312202224).

Almost surely, 2^1231464257 is an apocalyptic number.

It is an amenable number.

1231464257 is a deficient number, since it is larger than the sum of its proper divisors (17344639).

1231464257 is an equidigital number, since it uses as much as digits as its factorization.

1231464257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17344638.

The product of its digits is 40320, while the sum is 35.

The square root of 1231464257 is about 35092.2250220758. The cubic root of 1231464257 is about 1071.8662678580.

The spelling of 1231464257 in words is "one billion, two hundred thirty-one million, four hundred sixty-four thousand, two hundred fifty-seven".