125215210 has 16 divisors (see below), whose sum is σ = 225973800. Its totient is φ = 49955776.

The previous prime is 125215201. The next prime is 125215219. The reversal of 125215210 is 12512521.

It is an interprime number because it is at equal distance from previous prime (125215201) and next prime (125215219).

It can be written as a sum of positive squares in 4 ways, for example, as 72812089 + 52403121 = 8533^2 + 7239^2 .

It is not an unprimeable number, because it can be changed into a prime (125215219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12205 + ... + 19984.

Almost surely, 2^125215210 is an apocalyptic number.

125215210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125215210 is a deficient number, since it is larger than the sum of its proper divisors (100758590).

125215210 is a wasteful number, since it uses less digits than its factorization.

125215210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32585.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 125215210 is about 11189.9602322796. The cubic root of 125215210 is about 500.2867821472.

Adding to 125215210 its reverse (12512521), we get a palindrome (137727731).

The spelling of 125215210 in words is "one hundred twenty-five million, two hundred fifteen thousand, two hundred ten".