125530251 has 32 divisors (see below), whose sum is σ = 217755648. Its totient is φ = 62372640.

The previous prime is 125530247. The next prime is 125530259. The reversal of 125530251 is 152035521.

It is a happy number.

It is not a de Polignac number, because 125530251 - 2² = 125530247 is a prime.

It is a super-2 number, since 2×125530251² = 31515687832246002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125530259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6501 + ... + 17126.

It is an arithmetic number, because the mean of its divisors is an integer number (6804864).

Almost surely, 2^125530251 is an apocalyptic number.

125530251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125530251 is a deficient number, since it is larger than the sum of its proper divisors (92225397).

125530251 is a wasteful number, since it uses less digits than its factorization.

125530251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23671.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 125530251 is about 11204.0283380577. The cubic root of 125530251 is about 500.7060039809.

Adding to 125530251 its reverse (152035521), we get a palindrome (277565772).

The spelling of 125530251 in words is "one hundred twenty-five million, five hundred thirty thousand, two hundred fifty-one".