125215020 has 72 divisors (see below), whose sum is σ = 434083104. Its totient is φ = 28620288.

The previous prime is 125215019. The next prime is 125215021. The reversal of 125215020 is 20512521.

It is an interprime number because it is at equal distance from previous prime (125215019) and next prime (125215021).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 125214984 and 125215002.

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 in 23 ways as a sum of consecutive naturals, for example, 48429 + ... + 50948.

It is an arithmetic number, because the mean of its divisors is an integer number (6028932).

Almost surely, 2^125215020 is an apocalyptic number.

125215020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125215020 is an abundant number, since it is smaller than the sum of its proper divisors (308868084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125215020 is a wasteful number, since it uses less digits than its factorization.

125215020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99399 (or 99394 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 125215020 is about 11189.9517425233. The cubic root of 125215020 is about 500.2865291041.

Adding to 125215020 its reverse (20512521), we get a palindrome (145727541).

The spelling of 125215020 in words is "one hundred twenty-five million, two hundred fifteen thousand, twenty".