125215028 has 6 divisors (see below), whose sum is σ = 219126306. Its totient is φ = 62607512.

The previous prime is 125215021. The next prime is 125215031. The reversal of 125215028 is 820512521.

It can be written as a sum of positive squares in only one way, i.e., 119202724 + 6012304 = 10918^2 + 2452^2 .

It is a junction number, because it is equal to n+sod(n) for n = 125214988 and 125215006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125215021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651875 + ... + 15651882.

It is an arithmetic number, because the mean of its divisors is an integer number (36521051).

Almost surely, 2^125215028 is an apocalyptic number.

It is an amenable number.

125215028 is a deficient number, since it is larger than the sum of its proper divisors (93911278).

125215028 is a wasteful number, since it uses less digits than its factorization.

125215028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31303761 (or 31303759 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 125215028 is about 11189.9520999868. The cubic root of 125215028 is about 500.2865397586.

Adding to 125215028 its reverse (820512521), we get a palindrome (945727549).

The spelling of 125215028 in words is "one hundred twenty-five million, two hundred fifteen thousand, twenty-eight".