7920249 has 8 divisors (see below), whose sum is σ = 11181600. Its totient is φ = 4969536.

The previous prime is 7920233. The next prime is 7920251. The reversal of 7920249 is 9420297.

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

It is not a de Polignac number, because 7920249 - 2⁴ = 7920233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7920229) 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, 77599 + ... + 77700.

It is an arithmetic number, because the mean of its divisors is an integer number (1397700).

Almost surely, 2^7920249 is an apocalyptic number.

It is an amenable number.

7920249 is a deficient number, since it is larger than the sum of its proper divisors (3261351).

7920249 is a wasteful number, since it uses less digits than its factorization.

7920249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155319.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 7920249 is about 2814.2936946950. The cubic root of 7920249 is about 199.3331876103. Note that the first 3 decimals are identical.

The spelling of 7920249 in words is "seven million, nine hundred twenty thousand, two hundred forty-nine".