125415137 has 4 divisors (see below), whose sum is σ = 132792516. Its totient is φ = 118037760.

The previous prime is 125415109. The next prime is 125415193. The reversal of 125415137 is 731514521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73805281 + 51609856 = 8591^2 + 7184^2 .

It is a cyclic number.

It is not a de Polignac number, because 125415137 - 2⁸ = 125414881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125415337) 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 3 ways as a sum of consecutive naturals, for example, 3688664 + ... + 3688697.

It is an arithmetic number, because the mean of its divisors is an integer number (33198129).

Almost surely, 2^125415137 is an apocalyptic number.

125415137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

125415137 is a deficient number, since it is larger than the sum of its proper divisors (7377379).

125415137 is an equidigital number, since it uses as much as digits as its factorization.

125415137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377378.

The product of its digits is 4200, while the sum is 29.

The square root of 125415137 is about 11198.8899896374. The cubic root of 125415137 is about 500.5529043682.

Adding to 125415137 its reverse (731514521), we get a palindrome (856929658).

The spelling of 125415137 in words is "one hundred twenty-five million, four hundred fifteen thousand, one hundred thirty-seven".