13920542 has 4 divisors (see below), whose sum is σ = 20880816. Its totient is φ = 6960270.

The previous prime is 13920541. The next prime is 13920587. The reversal of 13920542 is 24502931.

13920542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24502931 = 2269 ⋅10799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13920541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3480134 + ... + 3480137.

It is an arithmetic number, because the mean of its divisors is an integer number (5220204).

Almost surely, 2^13920542 is an apocalyptic number.

13920542 is a deficient number, since it is larger than the sum of its proper divisors (6960274).

13920542 is an equidigital number, since it uses as much as digits as its factorization.

13920542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960273.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 13920542 is about 3731.0242561527. The cubic root of 13920542 is about 240.5573965818.

The spelling of 13920542 in words is "thirteen million, nine hundred twenty thousand, five hundred forty-two".