1230625581 has 16 divisors (see below), whose sum is σ = 1696972800. Its totient is φ = 792790128.

The previous prime is 1230625577. The next prime is 1230625589. The reversal of 1230625581 is 1855260321.

It is not a de Polignac number, because 1230625581 - 2² = 1230625577 is a prime.

It is a super-2 number, since 2×1230625581² = 3028878641223175122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230625589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44101 + ... + 66378.

It is an arithmetic number, because the mean of its divisors is an integer number (106060800).

Almost surely, 2^1230625581 is an apocalyptic number.

It is an amenable number.

1230625581 is a deficient number, since it is larger than the sum of its proper divisors (466347219).

1230625581 is a wasteful number, since it uses less digits than its factorization.

1230625581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110608.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 1230625581 is about 35080.2733883304. The cubic root of 1230625581 is about 1071.6228847853.

The spelling of 1230625581 in words is "one billion, two hundred thirty million, six hundred twenty-five thousand, five hundred eighty-one".