54121439 has 4 divisors (see below), whose sum is σ = 54516624. Its totient is φ = 53726256.

The previous prime is 54121429. The next prime is 54121469. The reversal of 54121439 is 93412145.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54121439 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 (54121409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197387 + ... + 197660.

It is an arithmetic number, because the mean of its divisors is an integer number (13629156).

Almost surely, 2^54121439 is an apocalyptic number.

54121439 is a deficient number, since it is larger than the sum of its proper divisors (395185).

54121439 is a wasteful number, since it uses less digits than its factorization.

54121439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395184.

The product of its digits is 4320, while the sum is 29.

The square root of 54121439 is about 7356.7274653884. The cubic root of 54121439 is about 378.2594427470.

The spelling of 54121439 in words is "fifty-four million, one hundred twenty-one thousand, four hundred thirty-nine".