15942481 has 16 divisors (see below), whose sum is σ = 17554320. Its totient is φ = 14417920.

The previous prime is 15942467. The next prime is 15942491. The reversal of 15942481 is 18424951.

It is a happy number.

15942481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 14400 + 15928081 = 120^2 + 3991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15942481 is a prime.

It is a super-2 number, since 2×15942481² = 508325400870722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15942461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61905 + ... + 62161.

It is an arithmetic number, because the mean of its divisors is an integer number (1097145).

Almost surely, 2^15942481 is an apocalyptic number.

It is an amenable number.

15942481 is a deficient number, since it is larger than the sum of its proper divisors (1611839).

15942481 is a wasteful number, since it uses less digits than its factorization.

15942481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404.

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

The square root of 15942481 is about 3992.8036515712. The cubic root of 15942481 is about 251.6818915885.

The spelling of 15942481 in words is "fifteen million, nine hundred forty-two thousand, four hundred eighty-one".