15125421740 has 48 divisors (see below), whose sum is σ = 37316432160. Its totient is φ = 5077063680.

The previous prime is 15125421737. The next prime is 15125421767. The reversal of 15125421740 is 4712452151.

It is a junction number, because it is equal to n+sod(n) for n = 15125421697 and 15125421706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2641445 + ... + 2647164.

It is an arithmetic number, because the mean of its divisors is an integer number (777425670).

Almost surely, 2^15125421740 is an apocalyptic number.

15125421740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15125421740 is an abundant number, since it is smaller than the sum of its proper divisors (22191010420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15125421740 is a wasteful number, since it uses less digits than its factorization.

15125421740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288642 (or 5288640 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

Adding to 15125421740 its reverse (4712452151), we get a palindrome (19837873891).

The spelling of 15125421740 in words is "fifteen billion, one hundred twenty-five million, four hundred twenty-one thousand, seven hundred forty".