125742437587 has 4 divisors (see below), whose sum is σ = 135414932800. Its totient is φ = 116069942376.

The previous prime is 125742437581. The next prime is 125742437591. The reversal of 125742437587 is 785734247521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125742437587 is a prime.

It is a super-2 number, since 2×125742437587² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125742437581) 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, 4836247587 + ... + 4836247612.

It is an arithmetic number, because the mean of its divisors is an integer number (33853733200).

Almost surely, 2^125742437587 is an apocalyptic number.

125742437587 is a deficient number, since it is larger than the sum of its proper divisors (9672495213).

125742437587 is an equidigital number, since it uses as much as digits as its factorization.

125742437587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9672495212.

The product of its digits is 13171200, while the sum is 55.

The spelling of 125742437587 in words is "one hundred twenty-five billion, seven hundred forty-two million, four hundred thirty-seven thousand, five hundred eighty-seven".