125655217 has 4 divisors (see below), whose sum is σ = 127530736. Its totient is φ = 123779700.

The previous prime is 125655203. The next prime is 125655239. The reversal of 125655217 is 712556521.

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: 712556521 = 269 ⋅2648909.

It is a cyclic number.

It is not a de Polignac number, because 125655217 - 2¹⁵ = 125622449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125655287) 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, 937659 + ... + 937792.

It is an arithmetic number, because the mean of its divisors is an integer number (31882684).

Almost surely, 2^125655217 is an apocalyptic number.

It is an amenable number.

125655217 is a deficient number, since it is larger than the sum of its proper divisors (1875519).

125655217 is an equidigital number, since it uses as much as digits as its factorization.

125655217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875518.

The product of its digits is 21000, while the sum is 34.

The square root of 125655217 is about 11209.6037842557. The cubic root of 125655217 is about 500.8721006632.

The spelling of 125655217 in words is "one hundred twenty-five million, six hundred fifty-five thousand, two hundred seventeen".