1231607245 has 16 divisors (see below), whose sum is σ = 1707127488. Its totient is φ = 843024640.

The previous prime is 1231607239. The next prime is 1231607261. The reversal of 1231607245 is 5427061321.

It is not a de Polignac number, because 1231607245 - 2⁵ = 1231607213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657679 + ... + 659548.

It is an arithmetic number, because the mean of its divisors is an integer number (106695468).

Almost surely, 2^1231607245 is an apocalyptic number.

It is an amenable number.

1231607245 is a deficient number, since it is larger than the sum of its proper divisors (475520243).

1231607245 is a wasteful number, since it uses less digits than its factorization.

1231607245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317260.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1231607245 is about 35094.2622803216. The cubic root of 1231607245 is about 1071.9077518290.

Adding to 1231607245 its reverse (5427061321), we get a palindrome (6658668566).

The spelling of 1231607245 in words is "one billion, two hundred thirty-one million, six hundred seven thousand, two hundred forty-five".