15134421 has 4 divisors (see below), whose sum is σ = 20179232. Its totient is φ = 10089612.

The previous prime is 15134419. The next prime is 15134461. The reversal of 15134421 is 12443151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 15134421 - 2¹ = 15134419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15134411) 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, 2522401 + ... + 2522406.

It is an arithmetic number, because the mean of its divisors is an integer number (5044808).

Almost surely, 2^15134421 is an apocalyptic number.

It is an amenable number.

15134421 is a deficient number, since it is larger than the sum of its proper divisors (5044811).

15134421 is an equidigital number, since it uses as much as digits as its factorization.

15134421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044810.

The product of its digits is 480, while the sum is 21.

The square root of 15134421 is about 3890.2983176101. The cubic root of 15134421 is about 247.3557081607.

Adding to 15134421 its reverse (12443151), we get a palindrome (27577572).

The spelling of 15134421 in words is "fifteen million, one hundred thirty-four thousand, four hundred twenty-one".