125220251 has 8 divisors (see below), whose sum is σ = 137064144. Its totient is φ = 113692320.

The previous prime is 125220239. The next prime is 125220269. The reversal of 125220251 is 152022521.

It is a happy number.

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 125220251 - 2⁶ = 125220187 is a prime.

It is a super-2 number, since 2×125220251² = 31360222521006002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125220751) 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, 78161 + ... + 79746.

It is an arithmetic number, because the mean of its divisors is an integer number (17133018).

Almost surely, 2^125220251 is an apocalyptic number.

125220251 is a deficient number, since it is larger than the sum of its proper divisors (11843893).

125220251 is a wasteful number, since it uses less digits than its factorization.

125220251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157981.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 125220251 is about 11190.1854765683. The cubic root of 125220251 is about 500.2934956869.

Adding to 125220251 its reverse (152022521), we get a palindrome (277242772).

The spelling of 125220251 in words is "one hundred twenty-five million, two hundred twenty thousand, two hundred fifty-one".