125145557 has 2 divisors, whose sum is σ = 125145558. Its totient is φ = 125145556.

The previous prime is 125145539. The next prime is 125145563. The reversal of 125145557 is 755541521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80442961 + 44702596 = 8969^2 + 6686^2 .

It is a cyclic number.

It is not a de Polignac number, because 125145557 - 2¹⁸ = 124883413 is a prime.

It is a super-2 number, since 2×125145557² = 31322820873680498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125145157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62572778 + 62572779.

It is an arithmetic number, because the mean of its divisors is an integer number (62572779).

Almost surely, 2^125145557 is an apocalyptic number.

It is an amenable number.

125145557 is a deficient number, since it is larger than the sum of its proper divisors (1).

125145557 is an equidigital number, since it uses as much as digits as its factorization.

125145557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35000, while the sum is 35.

The square root of 125145557 is about 11186.8475005249. The cubic root of 125145557 is about 500.1940007177.

The spelling of 125145557 in words is "one hundred twenty-five million, one hundred forty-five thousand, five hundred fifty-seven".