7457641 has 2 divisors, whose sum is σ = 7457642. Its totient is φ = 7457640.

The previous prime is 7457629. The next prime is 7457647. The reversal of 7457641 is 1467547.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7268416 + 189225 = 2696^2 + 435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7457641 is a prime.

7457641 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7457597 and 7457606.

It is not a weakly prime, because it can be changed into another prime (7457647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3728820 + 3728821.

It is an arithmetic number, because the mean of its divisors is an integer number (3728821).

Almost surely, 2^7457641 is an apocalyptic number.

It is an amenable number.

7457641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7457641 is an equidigital number, since it uses as much as digits as its factorization.

7457641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23520, while the sum is 34.

The square root of 7457641 is about 2730.8681769723. The cubic root of 7457641 is about 195.3741752658.

The spelling of 7457641 in words is "seven million, four hundred fifty-seven thousand, six hundred forty-one".