125879281 has 4 divisors (see below), whose sum is σ = 137322864. Its totient is φ = 114435700.

The previous prime is 125879269. The next prime is 125879329. The reversal of 125879281 is 182978521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182978521 = 11 ⋅16634411.

It is a cyclic number.

It is not a de Polignac number, because 125879281 - 2⁹ = 125878769 is a prime.

It is a super-2 number, since 2×125879281² = 31691186770153922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125879231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5721775 + ... + 5721796.

It is an arithmetic number, because the mean of its divisors is an integer number (34330716).

Almost surely, 2^125879281 is an apocalyptic number.

125879281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125879281 is a deficient number, since it is larger than the sum of its proper divisors (11443583).

125879281 is a wasteful number, since it uses less digits than its factorization.

125879281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11443582.

The product of its digits is 80640, while the sum is 43.

The square root of 125879281 is about 11219.5936200916. The cubic root of 125879281 is about 501.1696364344.

The spelling of 125879281 in words is "one hundred twenty-five million, eight hundred seventy-nine thousand, two hundred eighty-one".