2497621 has 4 divisors (see below), whose sum is σ = 2854432. Its totient is φ = 2140812.

The previous prime is 2497609. The next prime is 2497631. The reversal of 2497621 is 1267942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2497621 - 2⁹ = 2497109 is a prime.

It is a super-2 number, since 2×2497621² = 12476221319282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2497631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178395 + ... + 178408.

It is an arithmetic number, because the mean of its divisors is an integer number (713608).

2^2497621 is an apocalyptic number.

It is an amenable number.

2497621 is a deficient number, since it is larger than the sum of its proper divisors (356811).

2497621 is an equidigital number, since it uses as much as digits as its factorization.

2497621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356810.

The product of its digits is 6048, while the sum is 31.

The square root of 2497621 is about 1580.3863451701. The cubic root of 2497621 is about 135.6778165035.

The spelling of 2497621 in words is "two million, four hundred ninety-seven thousand, six hundred twenty-one".