7145557 has 2 divisors, whose sum is σ = 7145558. Its totient is φ = 7145556.

The previous prime is 7145533. The next prime is 7145563. The reversal of 7145557 is 7555417.

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., 5948721 + 1196836 = 2439^2 + 1094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7145557 is a prime.

7145557 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7145507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3572778 + 3572779.

It is an arithmetic number, because the mean of its divisors is an integer number (3572779).

Almost surely, 2^7145557 is an apocalyptic number.

It is an amenable number.

7145557 is a deficient number, since it is larger than the sum of its proper divisors (1).

7145557 is an equidigital number, since it uses as much as digits as its factorization.

7145557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24500, while the sum is 34.

The square root of 7145557 is about 2673.1174684252. The cubic root of 7145557 is about 192.6099400105.

The spelling of 7145557 in words is "seven million, one hundred forty-five thousand, five hundred fifty-seven".