2402521 has 8 divisors (see below), whose sum is σ = 2692224. Its totient is φ = 2124720.

The previous prime is 2402509. The next prime is 2402537. The reversal of 2402521 is 1252042.

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

It is a cyclic number.

It is not a de Polignac number, because 2402521 - 2⁹ = 2402009 is a prime.

It is a Duffinian number.

2402521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2402495 and 2402504.

It is not an unprimeable number, because it can be changed into a prime (2402501) 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, 2545 + ... + 3358.

It is an arithmetic number, because the mean of its divisors is an integer number (336528).

2^2402521 is an apocalyptic number.

It is an amenable number.

2402521 is a deficient number, since it is larger than the sum of its proper divisors (289703).

2402521 is a wasteful number, since it uses less digits than its factorization.

2402521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5951.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2402521 is about 1550.0067741787. The cubic root of 2402521 is about 133.9334525137.

Adding to 2402521 its reverse (1252042), we get a palindrome (3654563).

The spelling of 2402521 in words is "two million, four hundred two thousand, five hundred twenty-one".