2620605 has 32 divisors (see below), whose sum is σ = 4596480. Its totient is φ = 1267200.

The previous prime is 2620591. The next prime is 2620619. The reversal of 2620605 is 5060262.

It is an interprime number because it is at equal distance from previous prime (2620591) and next prime (2620619).

It is not a de Polignac number, because 2620605 - 2⁴ = 2620589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17280 + ... + 17430.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2^2620605 is an apocalyptic number.

It is an amenable number.

2620605 is a deficient number, since it is larger than the sum of its proper divisors (1975875).

2620605 is a wasteful number, since it uses less digits than its factorization.

2620605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2620605 is about 1618.8282799605. The cubic root of 2620605 is about 137.8691786906.

Adding to 2620605 its reverse (5060262), we get a palindrome (7680867).

The spelling of 2620605 in words is "two million, six hundred twenty thousand, six hundred five".