7491641 has 2 divisors, whose sum is σ = 7491642. Its totient is φ = 7491640.

The previous prime is 7491623. The next prime is 7491647. The reversal of 7491641 is 1461947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 495616 = 2645^2 + 704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7491641 is a prime.

It is a super-2 number, since 2×7491641² = 112249369745762, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7491598 and 7491607.

It is not a weakly prime, because it can be changed into another prime (7491647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3745820 + 3745821.

It is an arithmetic number, because the mean of its divisors is an integer number (3745821).

Almost surely, 2^7491641 is an apocalyptic number.

It is an amenable number.

7491641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7491641 is an equidigital number, since it uses as much as digits as its factorization.

7491641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 7491641 is about 2737.0862244365. The cubic root of 7491641 is about 195.6706341837.

The spelling of 7491641 in words is "seven million, four hundred ninety-one thousand, six hundred forty-one".