15125420 has 12 divisors (see below), whose sum is σ = 31763424. Its totient is φ = 6050160.

The previous prime is 15125371. The next prime is 15125423. The reversal of 15125420 is 2452151.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 756271 = 15125420 / (1 + 5 + 1 + 2 + 5 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 15125392 and 15125401.

It is not an unprimeable number, because it can be changed into a prime (15125423) 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, 378116 + ... + 378155.

It is an arithmetic number, because the mean of its divisors is an integer number (2646952).

Almost surely, 2^15125420 is an apocalyptic number.

15125420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15125420 is an abundant number, since it is smaller than the sum of its proper divisors (16638004).

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

15125420 is a wasteful number, since it uses less digits than its factorization.

15125420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756280 (or 756278 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 15125420 is about 3889.1412933963. The cubic root of 15125420 is about 247.3066612396.

Adding to 15125420 its reverse (2452151), we get a palindrome (17577571).

The spelling of 15125420 in words is "fifteen million, one hundred twenty-five thousand, four hundred twenty".