2621439 has 6 divisors (see below), whose sum is σ = 3786536. Its totient is φ = 1747620.

The previous prime is 2621431. The next prime is 2621447. The reversal of 2621439 is 9341262.

2621439 is a `hidden beast` number, since 2 + 621 + 4 + 39 = 666.

It is an interprime number because it is at equal distance from previous prime (2621431) and next prime (2621447).

It is not a de Polignac number, because 2621439 - 2³ = 2621431 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145627 + ... + 145644.

2^2621439 is an apocalyptic number.

2621439 is a deficient number, since it is larger than the sum of its proper divisors (1165097).

2621439 is a wasteful number, since it uses less digits than its factorization.

2621439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291277 (or 291274 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 2621439 is about 1619.0858531900. The cubic root of 2621439 is about 137.8838026292.

The spelling of 2621439 in words is "two million, six hundred twenty-one thousand, four hundred thirty-nine".