7557157 has 2 divisors, whose sum is σ = 7557158. Its totient is φ = 7557156.

The previous prime is 7557127. The next prime is 7557167. The reversal of 7557157 is 7517557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7540516 + 16641 = 2746^2 + 129^2 .

It is an emirp because it is prime and its reverse (7517557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7557157 - 2⁷ = 7557029 is a prime.

It is a super-2 number, since 2×7557157² = 114221243845298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7557127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3778578 + 3778579.

It is an arithmetic number, because the mean of its divisors is an integer number (3778579).

Almost surely, 2^7557157 is an apocalyptic number.

It is an amenable number.

7557157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7557157 is an equidigital number, since it uses as much as digits as its factorization.

7557157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42875, while the sum is 37.

The square root of 7557157 is about 2749.0283738077. The cubic root of 7557157 is about 196.2393733005.

The spelling of 7557157 in words is "seven million, five hundred fifty-seven thousand, one hundred fifty-seven".