2493921 has 8 divisors (see below), whose sum is σ = 3500320. Its totient is φ = 1575072.

The previous prime is 2493877. The next prime is 2493923. The reversal of 2493921 is 1293942.

2493921 = T₇₈ + T₇₉ + ... + T₂₄₈.

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

It is not a de Polignac number, because 2493921 - 2⁹ = 2493409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2493923) 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, 21820 + ... + 21933.

It is an arithmetic number, because the mean of its divisors is an integer number (437540).

2^2493921 is an apocalyptic number.

It is an amenable number.

2493921 is a deficient number, since it is larger than the sum of its proper divisors (1006399).

2493921 is a wasteful number, since it uses less digits than its factorization.

2493921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43775.

The product of its digits is 3888, while the sum is 30.

The square root of 2493921 is about 1579.2153114759. The cubic root of 2493921 is about 135.6107852474.

The spelling of 2493921 in words is "two million, four hundred ninety-three thousand, nine hundred twenty-one".