8251491 has 8 divisors (see below), whose sum is σ = 11581120. Its totient is φ = 5211432.

The previous prime is 8251489. The next prime is 8251493. The reversal of 8251491 is 1941528.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8251489) and next prime (8251493).

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

It is not a de Polignac number, because 8251491 - 2¹ = 8251489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8251493) 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, 72325 + ... + 72438.

It is an arithmetic number, because the mean of its divisors is an integer number (1447640).

Almost surely, 2^8251491 is an apocalyptic number.

8251491 is a deficient number, since it is larger than the sum of its proper divisors (3329629).

8251491 is a wasteful number, since it uses less digits than its factorization.

8251491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144785.

The product of its digits is 2880, while the sum is 30.

The square root of 8251491 is about 2872.5408613282. The cubic root of 8251491 is about 202.0741730027.

The spelling of 8251491 in words is "eight million, two hundred fifty-one thousand, four hundred ninety-one".