5420639 has 4 divisors (see below), whose sum is σ = 6195024. Its totient is φ = 4646256.

The previous prime is 5420633. The next prime is 5420669. The reversal of 5420639 is 9360245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9360245 = 5 ⋅1872049.

It is a cyclic number.

It is not a de Polignac number, because 5420639 - 2²⁰ = 4372063 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 (5420633) 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, 387182 + ... + 387195.

It is an arithmetic number, because the mean of its divisors is an integer number (1548756).

Almost surely, 2^5420639 is an apocalyptic number.

5420639 is a deficient number, since it is larger than the sum of its proper divisors (774385).

5420639 is an equidigital number, since it uses as much as digits as its factorization.

5420639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774384.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 5420639 is about 2328.2265783209. The cubic root of 5420639 is about 175.6642942180.

It can be divided in two parts, 54206 and 39, that added together give a palindrome (54245).

The spelling of 5420639 in words is "five million, four hundred twenty thousand, six hundred thirty-nine".