1231854956 has 12 divisors (see below), whose sum is σ = 2158182768. Its totient is φ = 615231312.

The previous prime is 1231854947. The next prime is 1231854961. The reversal of 1231854956 is 6594581321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170051 + ... + 177146.

It is an arithmetic number, because the mean of its divisors is an integer number (179848564).

Almost surely, 2^1231854956 is an apocalyptic number.

It is an amenable number.

1231854956 is a deficient number, since it is larger than the sum of its proper divisors (926327812).

1231854956 is a wasteful number, since it uses less digits than its factorization.

1231854956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348088 (or 348086 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The square root of 1231854956 is about 35097.7913265208. The cubic root of 1231854956 is about 1071.9796106521.

The spelling of 1231854956 in words is "one billion, two hundred thirty-one million, eight hundred fifty-four thousand, nine hundred fifty-six".