125219917 has 2 divisors, whose sum is σ = 125219918. Its totient is φ = 125219916.

The previous prime is 125219837. The next prime is 125219923. The reversal of 125219917 is 719912521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124411716 + 808201 = 11154^2 + 899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125219917 is a prime.

It is a super-2 number, since 2×125219917² = 31360055226973778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125219947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62609958 + 62609959.

It is an arithmetic number, because the mean of its divisors is an integer number (62609959).

Almost surely, 2^125219917 is an apocalyptic number.

It is an amenable number.

125219917 is a deficient number, since it is larger than the sum of its proper divisors (1).

125219917 is an equidigital number, since it uses as much as digits as its factorization.

125219917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 37.

The square root of 125219917 is about 11190.1705527664. The cubic root of 125219917 is about 500.2930508755.

The spelling of 125219917 in words is "one hundred twenty-five million, two hundred nineteen thousand, nine hundred seventeen".