125161553 has 12 divisors (see below), whose sum is σ = 138205620. Its totient is φ = 113261280.

The previous prime is 125161549. The next prime is 125161559. The reversal of 125161553 is 355161521.

It can be written as a sum of positive squares in 2 ways, for example, as 50027329 + 75134224 = 7073^2 + 8668^2 .

It is not a de Polignac number, because 125161553 - 2² = 125161549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125161559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25451 + ... + 29967.

It is an arithmetic number, because the mean of its divisors is an integer number (11517135).

Almost surely, 2^125161553 is an apocalyptic number.

It is an amenable number.

125161553 is a deficient number, since it is larger than the sum of its proper divisors (13044067).

125161553 is a wasteful number, since it uses less digits than its factorization.

125161553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768 (or 4757 counting only the distinct ones).

The product of its digits is 4500, while the sum is 29.

The square root of 125161553 is about 11187.5624244068. The cubic root of 125161553 is about 500.2153112688.

The spelling of 125161553 in words is "one hundred twenty-five million, one hundred sixty-one thousand, five hundred fifty-three".