125607557 has 2 divisors, whose sum is σ = 125607558. Its totient is φ = 125607556.

The previous prime is 125607473. The next prime is 125607571. The reversal of 125607557 is 755706521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115584001 + 10023556 = 10751^2 + 3166^2 .

It is an emirp because it is prime and its reverse (755706521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125607557 - 2²⁰ = 124558981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125607557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125607857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62803778 + 62803779.

It is an arithmetic number, because the mean of its divisors is an integer number (62803779).

Almost surely, 2^125607557 is an apocalyptic number.

It is an amenable number.

125607557 is a deficient number, since it is larger than the sum of its proper divisors (1).

125607557 is an equidigital number, since it uses as much as digits as its factorization.

125607557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73500, while the sum is 38.

The square root of 125607557 is about 11207.4777269464. The cubic root of 125607557 is about 500.8087670862.

The spelling of 125607557 in words is "one hundred twenty-five million, six hundred seven thousand, five hundred fifty-seven".