125181397 has 12 divisors (see below), whose sum is σ = 141319948. Its totient is φ = 110721600.

The previous prime is 125181391. The next prime is 125181401. The reversal of 125181397 is 793181521.

It can be written as a sum of positive squares in 2 ways, for example, as 73427761 + 51753636 = 8569^2 + 7194^2 .

It is not a de Polignac number, because 125181397 - 2¹¹ = 125179349 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125181391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9504 + ... + 18457.

Almost surely, 2^125181397 is an apocalyptic number.

It is an amenable number.

125181397 is a deficient number, since it is larger than the sum of its proper divisors (16138551).

125181397 is a wasteful number, since it uses less digits than its factorization.

125181397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28020 (or 28009 counting only the distinct ones).

The product of its digits is 15120, while the sum is 37.

The square root of 125181397 is about 11188.4492669896. The cubic root of 125181397 is about 500.2417457658.

The spelling of 125181397 in words is "one hundred twenty-five million, one hundred eighty-one thousand, three hundred ninety-seven".