15055421 has 8 divisors (see below), whose sum is σ = 15978240. Its totient is φ = 14136768.

The previous prime is 15055393. The next prime is 15055427. The reversal of 15055421 is 12455051.

It is a happy number.

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 15055421 - 2⁶ = 15055357 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 (15055427) 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, 9590 + ... + 11048.

It is an arithmetic number, because the mean of its divisors is an integer number (1997280).

Almost surely, 2^15055421 is an apocalyptic number.

It is an amenable number.

15055421 is a deficient number, since it is larger than the sum of its proper divisors (922819).

15055421 is a wasteful number, since it uses less digits than its factorization.

15055421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 15055421 is about 3880.1315699342. The cubic root of 15055421 is about 246.9245673265.

The spelling of 15055421 in words is "fifteen million, fifty-five thousand, four hundred twenty-one".