125587817 has 2 divisors, whose sum is σ = 125587818. Its totient is φ = 125587816.

The previous prime is 125587769. The next prime is 125587829. The reversal of 125587817 is 718785521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101223721 + 24364096 = 10061^2 + 4936^2 .

It is a cyclic number.

It is not a de Polignac number, because 125587817 - 2¹⁶ = 125522281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125587897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62793908 + 62793909.

It is an arithmetic number, because the mean of its divisors is an integer number (62793909).

Almost surely, 2^125587817 is an apocalyptic number.

It is an amenable number.

125587817 is a deficient number, since it is larger than the sum of its proper divisors (1).

125587817 is an equidigital number, since it uses as much as digits as its factorization.

125587817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156800, while the sum is 44.

The square root of 125587817 is about 11206.5970303210. The cubic root of 125587817 is about 500.7825306526.

The spelling of 125587817 in words is "one hundred twenty-five million, five hundred eighty-seven thousand, eight hundred seventeen".