2492665921 has 8 divisors (see below), whose sum is σ = 2519346024. Its totient is φ = 2466122880.

The previous prime is 2492665909. The next prime is 2492665969. The reversal of 2492665921 is 1295662942.

It can be written as a sum of positive squares in 4 ways, for example, as 136048896 + 2356617025 = 11664^2 + 48545^2 .

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 2492665921 - 2⁷ = 2492665793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2492675921) 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, 2511 + ... + 70651.

It is an arithmetic number, because the mean of its divisors is an integer number (314918253).

Almost surely, 2^2492665921 is an apocalyptic number.

It is an amenable number.

2492665921 is a deficient number, since it is larger than the sum of its proper divisors (26680103).

2492665921 is a wasteful number, since it uses less digits than its factorization.

2492665921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68531.

The product of its digits is 466560, while the sum is 46.

The square root of 2492665921 is about 49926.6053422421. The cubic root of 2492665921 is about 1355.8803248063.

The spelling of 2492665921 in words is "two billion, four hundred ninety-two million, six hundred sixty-five thousand, nine hundred twenty-one".