2400621 has 16 divisors (see below), whose sum is σ = 3429504. Its totient is φ = 1488384.

The previous prime is 2400613. The next prime is 2400623. The reversal of 2400621 is 1260042.

It is not a de Polignac number, because 2400621 - 2³ = 2400613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2400621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5025 + ... + 5481.

It is an arithmetic number, because the mean of its divisors is an integer number (214344).

2^2400621 is an apocalyptic number.

It is an amenable number.

2400621 is a deficient number, since it is larger than the sum of its proper divisors (1028883).

2400621 is a wasteful number, since it uses less digits than its factorization.

2400621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2400621 is about 1549.3937524077. The cubic root of 2400621 is about 133.8981367390.

Adding to 2400621 its reverse (1260042), we get a palindrome (3660663).

The spelling of 2400621 in words is "two million, four hundred thousand, six hundred twenty-one".