8252991 has 6 divisors (see below), whose sum is σ = 11921000. Its totient is φ = 5501988.

The previous prime is 8252989. The next prime is 8253029. The reversal of 8252991 is 1992528.

It is not a de Polignac number, because 8252991 - 2¹ = 8252989 is a prime.

It is a super-2 number, since 2×8252991² = 136223720892162, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8252941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458491 + ... + 458508.

Almost surely, 2^8252991 is an apocalyptic number.

8252991 is a deficient number, since it is larger than the sum of its proper divisors (3668009).

8252991 is a wasteful number, since it uses less digits than its factorization.

8252991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917005 (or 917002 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 8252991 is about 2872.8019423552. The cubic root of 8252991 is about 202.0864169674.

The spelling of 8252991 in words is "eight million, two hundred fifty-two thousand, nine hundred ninety-one".