1230785131 has 8 divisors (see below), whose sum is σ = 1319009184. Its totient is φ = 1145453760.

The previous prime is 1230785119. The next prime is 1230785137. The reversal of 1230785131 is 1315870321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230785131 is a prime.

It is a super-2 number, since 2×1230785131² = 3029664077381374322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230785093 and 1230785102.

It is not an unprimeable number, because it can be changed into a prime (1230785137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722290 + ... + 723991.

It is an arithmetic number, because the mean of its divisors is an integer number (164876148).

Almost surely, 2^1230785131 is an apocalyptic number.

1230785131 is a deficient number, since it is larger than the sum of its proper divisors (88224053).

1230785131 is a wasteful number, since it uses less digits than its factorization.

1230785131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446341.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1230785131 is about 35082.5473847040. The cubic root of 1230785131 is about 1071.6691945770.

The spelling of 1230785131 in words is "one billion, two hundred thirty million, seven hundred eighty-five thousand, one hundred thirty-one".