7872291 has 18 divisors (see below), whose sum is σ = 13228332. Its totient is φ = 4498200.

The previous prime is 7872283. The next prime is 7872313. The reversal of 7872291 is 1922787.

It is not a de Polignac number, because 7872291 - 2³ = 7872283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7872191) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8485 + ... + 9366.

Almost surely, 2^7872291 is an apocalyptic number.

7872291 is a deficient number, since it is larger than the sum of its proper divisors (5356041).

7872291 is a wasteful number, since it uses less digits than its factorization.

7872291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17871 (or 17861 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 7872291 is about 2805.7603247605. The cubic root of 7872291 is about 198.9300445171.

The spelling of 7872291 in words is "seven million, eight hundred seventy-two thousand, two hundred ninety-one".