15149421 has 24 divisors (see below), whose sum is σ = 25818624. Its totient is φ = 8376480.

The previous prime is 15149419. The next prime is 15149423. The reversal of 15149421 is 12494151.

15149421 is a `hidden beast` number, since 151 + 494 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (15149419) and next prime (15149423).

It is not a de Polignac number, because 15149421 - 2¹ = 15149419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15149423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1926 + ... + 5831.

It is an arithmetic number, because the mean of its divisors is an integer number (1075776).

Almost surely, 2^15149421 is an apocalyptic number.

It is an amenable number.

15149421 is a deficient number, since it is larger than the sum of its proper divisors (10669203).

15149421 is a wasteful number, since it uses less digits than its factorization.

15149421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7801 (or 7798 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 15149421 is about 3892.2257128795. The cubic root of 15149421 is about 247.4374007585.

The spelling of 15149421 in words is "fifteen million, one hundred forty-nine thousand, four hundred twenty-one".