1231374945 has 32 divisors (see below), whose sum is σ = 2041038720. Its totient is φ = 633185280.

The previous prime is 1231374919. The next prime is 1231374953. The reversal of 1231374945 is 5494731321.

It is not a de Polignac number, because 1231374945 - 2¹³ = 1231366753 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392985 + ... + 396105.

It is an arithmetic number, because the mean of its divisors is an integer number (63782460).

Almost surely, 2^1231374945 is an apocalyptic number.

1231374945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231374945 is a deficient number, since it is larger than the sum of its proper divisors (809663775).

1231374945 is a wasteful number, since it uses less digits than its factorization.

1231374945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065.

The product of its digits is 90720, while the sum is 39.

The square root of 1231374945 is about 35090.9524664122. The cubic root of 1231374945 is about 1071.8403548487.

The spelling of 1231374945 in words is "one billion, two hundred thirty-one million, three hundred seventy-four thousand, nine hundred forty-five".