15200421 has 8 divisors (see below), whose sum is σ = 20447040. Its totient is φ = 10043712.

The previous prime is 15200417. The next prime is 15200441. The reversal of 15200421 is 12400251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15200421 - 2² = 15200417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15200421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15200441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22081 + ... + 22758.

It is an arithmetic number, because the mean of its divisors is an integer number (2555880).

Almost surely, 2^15200421 is an apocalyptic number.

It is an amenable number.

15200421 is a deficient number, since it is larger than the sum of its proper divisors (5246619).

15200421 is a wasteful number, since it uses less digits than its factorization.

15200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44955.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 15200421 is about 3898.7717296605. The cubic root of 15200421 is about 247.7147528994.

Adding to 15200421 its reverse (12400251), we get a palindrome (27600672).

The spelling of 15200421 in words is "fifteen million, two hundred thousand, four hundred twenty-one".