7651491 has 4 divisors (see below), whose sum is σ = 10201992. Its totient is φ = 5100992.

The previous prime is 7651477. The next prime is 7651499. The reversal of 7651491 is 1941567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1941567 = 3 ⋅647189.

It is a cyclic number.

It is not a de Polignac number, because 7651491 - 2¹¹ = 7649443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7651499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275246 + ... + 1275251.

It is an arithmetic number, because the mean of its divisors is an integer number (2550498).

Almost surely, 2^7651491 is an apocalyptic number.

7651491 is a deficient number, since it is larger than the sum of its proper divisors (2550501).

7651491 is a wasteful number, since it uses less digits than its factorization.

7651491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550500.

The product of its digits is 7560, while the sum is 33.

The square root of 7651491 is about 2766.1328601497. The cubic root of 7651491 is about 197.0525339380.

The spelling of 7651491 in words is "seven million, six hundred fifty-one thousand, four hundred ninety-one".