15020421 has 8 divisors (see below), whose sum is σ = 21567840. Its totient is φ = 9243312.

The previous prime is 15020419. The next prime is 15020429. The reversal of 15020421 is 12402051.

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

It is not a de Polignac number, because 15020421 - 2¹ = 15020419 is a prime.

It is a super-2 number, since 2×15020421² = 451226094034482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15020421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15020429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192531 + ... + 192608.

It is an arithmetic number, because the mean of its divisors is an integer number (2695980).

Almost surely, 2^15020421 is an apocalyptic number.

It is an amenable number.

15020421 is a deficient number, since it is larger than the sum of its proper divisors (6547419).

15020421 is a wasteful number, since it uses less digits than its factorization.

15020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385155.

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

The square root of 15020421 is about 3875.6187893032. The cubic root of 15020421 is about 246.7330733876.

Adding to 15020421 its reverse (12402051), we get a palindrome (27422472).

The spelling of 15020421 in words is "fifteen million, twenty thousand, four hundred twenty-one".