15421229 has 8 divisors (see below), whose sum is σ = 16048128. Its totient is φ = 14802480.

The previous prime is 15421213. The next prime is 15421249. The reversal of 15421229 is 92212451.

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

It is a cyclic number.

It is not a de Polignac number, because 15421229 - 2⁴ = 15421213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15421198 and 15421207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15421249) 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, 1979 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (2006016).

Almost surely, 2^15421229 is an apocalyptic number.

It is an amenable number.

15421229 is a deficient number, since it is larger than the sum of its proper divisors (626899).

15421229 is a wasteful number, since it uses less digits than its factorization.

15421229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its digits is 1440, while the sum is 26.

The square root of 15421229 is about 3926.9872676137. The cubic root of 15421229 is about 248.9084624526.

The spelling of 15421229 in words is "fifteen million, four hundred twenty-one thousand, two hundred twenty-nine".