7457561 has 2 divisors, whose sum is σ = 7457562. Its totient is φ = 7457560.

The previous prime is 7457503. The next prime is 7457573. The reversal of 7457561 is 1657547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7054336 + 403225 = 2656^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 7457561 - 2¹⁴ = 7441177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7457581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3728780 + 3728781.

It is an arithmetic number, because the mean of its divisors is an integer number (3728781).

Almost surely, 2^7457561 is an apocalyptic number.

It is an amenable number.

7457561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7457561 is an equidigital number, since it uses as much as digits as its factorization.

7457561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 35.

The square root of 7457561 is about 2730.8535295764. The cubic root of 7457561 is about 195.3734766539.

The spelling of 7457561 in words is "seven million, four hundred fifty-seven thousand, five hundred sixty-one".