54140421 has 4 divisors (see below), whose sum is σ = 72187232. Its totient is φ = 36093612.

The previous prime is 54140407. The next prime is 54140473. The reversal of 54140421 is 12404145.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 54140421 - 2⁵ = 54140389 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 (54140521) 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, 9023401 + ... + 9023406.

It is an arithmetic number, because the mean of its divisors is an integer number (18046808).

Almost surely, 2^54140421 is an apocalyptic number.

It is an amenable number.

54140421 is a deficient number, since it is larger than the sum of its proper divisors (18046811).

54140421 is a wasteful number, since it uses less digits than its factorization.

54140421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18046810.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 54140421 is about 7358.0174639641. The cubic root of 54140421 is about 378.3036598608.

Adding to 54140421 its reverse (12404145), we get a palindrome (66544566).

The spelling of 54140421 in words is "fifty-four million, one hundred forty thousand, four hundred twenty-one".