125000126137 has 4 divisors (see below), whose sum is σ = 125899407760. Its totient is φ = 124100844516.

The previous prime is 125000126113. The next prime is 125000126177. The reversal of 125000126137 is 731621000521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 731621000521 = 40193 ⋅18202697.

It is a cyclic number.

It is not a de Polignac number, because 125000126137 - 2²³ = 124991737529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125000126177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449640603 + ... + 449640880.

It is an arithmetic number, because the mean of its divisors is an integer number (31474851940).

Almost surely, 2^125000126137 is an apocalyptic number.

It is an amenable number.

125000126137 is a deficient number, since it is larger than the sum of its proper divisors (899281623).

125000126137 is an equidigital number, since it uses as much as digits as its factorization.

125000126137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899281622.

The product of its (nonzero) digits is 2520, while the sum is 28.

Adding to 125000126137 its reverse (731621000521), we get a palindrome (856621126658).

The spelling of 125000126137 in words is "one hundred twenty-five billion, one hundred twenty-six thousand, one hundred thirty-seven".