2521618 has 16 divisors (see below), whose sum is σ = 4196160. Its totient is φ = 1126800.

The previous prime is 2521613. The next prime is 2521621. The reversal of 2521618 is 8161252.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2521592 and 2521601.

It is not an unprimeable number, because it can be changed into a prime (2521613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (262260).

2^2521618 is an apocalyptic number.

2521618 is a deficient number, since it is larger than the sum of its proper divisors (1674542).

2521618 is a wasteful number, since it uses less digits than its factorization.

2521618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953.

The product of its digits is 960, while the sum is 25.

The square root of 2521618 is about 1587.9603269603. The cubic root of 2521618 is about 136.1109604823.

The spelling of 2521618 in words is "two million, five hundred twenty-one thousand, six hundred eighteen".