125831215 has 8 divisors (see below), whose sum is σ = 151151760. Its totient is φ = 100562112.

The previous prime is 125831207. The next prime is 125831231. The reversal of 125831215 is 512138521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125831215 - 2³ = 125831207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7254 + ... + 17443.

It is an arithmetic number, because the mean of its divisors is an integer number (18893970).

Almost surely, 2^125831215 is an apocalyptic number.

125831215 is a deficient number, since it is larger than the sum of its proper divisors (25320545).

125831215 is a wasteful number, since it uses less digits than its factorization.

125831215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25721.

The product of its digits is 2400, while the sum is 28.

The square root of 125831215 is about 11217.4513593775. The cubic root of 125831215 is about 501.1058391033.

Adding to 125831215 its reverse (512138521), we get a palindrome (637969736).

The spelling of 125831215 in words is "one hundred twenty-five million, eight hundred thirty-one thousand, two hundred fifteen".