5651491 has 16 divisors (see below), whose sum is σ = 6292800. Its totient is φ = 5056128.

The previous prime is 5651479. The next prime is 5651501. The reversal of 5651491 is 1941565.

It is a cyclic number.

It is not a de Polignac number, because 5651491 - 2¹⁹ = 5127203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5651431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24565 + ... + 24793.

It is an arithmetic number, because the mean of its divisors is an integer number (393300).

Almost surely, 2^5651491 is an apocalyptic number.

5651491 is a deficient number, since it is larger than the sum of its proper divisors (641309).

5651491 is a wasteful number, since it uses less digits than its factorization.

5651491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its digits is 5400, while the sum is 31.

The square root of 5651491 is about 2377.2864783193. The cubic root of 5651491 is about 178.1234152316.

The spelling of 5651491 in words is "five million, six hundred fifty-one thousand, four hundred ninety-one".