125917279 has 4 divisors (see below), whose sum is σ = 127094184. Its totient is φ = 124740376.

The previous prime is 125917247. The next prime is 125917291. The reversal of 125917279 is 972719521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972719521 = 181 ⋅5374141.

It is a cyclic number.

It is not a de Polignac number, because 125917279 - 2⁵ = 125917247 is a prime.

It is a super-2 number, since 2×125917279² = 31710322301527682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125917219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588292 + ... + 588505.

It is an arithmetic number, because the mean of its divisors is an integer number (31773546).

Almost surely, 2^125917279 is an apocalyptic number.

125917279 is a deficient number, since it is larger than the sum of its proper divisors (1176905).

125917279 is a wasteful number, since it uses less digits than its factorization.

125917279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176904.

The product of its digits is 79380, while the sum is 43.

The square root of 125917279 is about 11221.2868691608. The cubic root of 125917279 is about 501.2200591565.

The spelling of 125917279 in words is "one hundred twenty-five million, nine hundred seventeen thousand, two hundred seventy-nine".