15424981 has 8 divisors (see below), whose sum is σ = 18121824. Its totient is φ = 12943920.

The previous prime is 15424957. The next prime is 15424991. The reversal of 15424981 is 18942451.

It is a happy number.

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

It is not a de Polignac number, because 15424981 - 2¹³ = 15416789 is a prime.

It is a super-2 number, since 2×15424981² = 475860077700722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15424991) 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, 53791 + ... + 54076.

It is an arithmetic number, because the mean of its divisors is an integer number (2265228).

Almost surely, 2^15424981 is an apocalyptic number.

15424981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15424981 is a deficient number, since it is larger than the sum of its proper divisors (2696843).

15424981 is a wasteful number, since it uses less digits than its factorization.

15424981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107891.

The product of its digits is 11520, while the sum is 34.

The square root of 15424981 is about 3927.4649584688. The cubic root of 15424981 is about 248.9286473726.

The spelling of 15424981 in words is "fifteen million, four hundred twenty-four thousand, nine hundred eighty-one".