125497251 has 12 divisors (see below), whose sum is σ = 197753400. Its totient is φ = 76058880.

The previous prime is 125497249. The next prime is 125497277. The reversal of 125497251 is 152794521.

It is not a de Polignac number, because 125497251 - 2¹ = 125497249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125497201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 633726 + ... + 633923.

It is an arithmetic number, because the mean of its divisors is an integer number (16479450).

Almost surely, 2^125497251 is an apocalyptic number.

125497251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125497251 is a deficient number, since it is larger than the sum of its proper divisors (72256149).

125497251 is a wasteful number, since it uses less digits than its factorization.

125497251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267666 (or 1267663 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 125497251 is about 11202.5555566576. Note that the first 5 decimals coincide. The cubic root of 125497251 is about 500.6621241296.

The spelling of 125497251 in words is "one hundred twenty-five million, four hundred ninety-seven thousand, two hundred fifty-one".