15070421 has 4 divisors (see below), whose sum is σ = 15089472. Its totient is φ = 15051372.

The previous prime is 15070399. The next prime is 15070441. The reversal of 15070421 is 12407051.

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 a cyclic number.

It is not a de Polignac number, because 15070421 - 2⁶ = 15070357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15070393 and 15070402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15070441) 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, 8285 + ... + 9938.

It is an arithmetic number, because the mean of its divisors is an integer number (3772368).

Almost surely, 2^15070421 is an apocalyptic number.

It is an amenable number.

15070421 is a deficient number, since it is larger than the sum of its proper divisors (19051).

15070421 is an equidigital number, since it uses as much as digits as its factorization.

15070421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19050.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 15070421 is about 3882.0640128674. The cubic root of 15070421 is about 247.0065453089.

Adding to 15070421 its reverse (12407051), we get a palindrome (27477472).

The spelling of 15070421 in words is "fifteen million, seventy thousand, four hundred twenty-one".