2521651 has 8 divisors (see below), whose sum is σ = 2870784. Its totient is φ = 2192520.

The previous prime is 2521643. The next prime is 2521681. The reversal of 2521651 is 1561252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2521651 - 2³ = 2521643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521621) 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, 4731 + ... + 5236.

It is an arithmetic number, because the mean of its divisors is an integer number (358848).

2^2521651 is an apocalyptic number.

2521651 is a deficient number, since it is larger than the sum of its proper divisors (349133).

2521651 is a wasteful number, since it uses less digits than its factorization.

2521651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001.

The product of its digits is 600, while the sum is 22.

The square root of 2521651 is about 1587.9707176142. The cubic root of 2521651 is about 136.1115542337. Note that the first 3 decimals are identical.

The spelling of 2521651 in words is "two million, five hundred twenty-one thousand, six hundred fifty-one".