1015449157 has 2 divisors, whose sum is σ = 1015449158. Its totient is φ = 1015449156.

The previous prime is 1015449143. The next prime is 1015449161. The reversal of 1015449157 is 7519445101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602506116 + 412943041 = 24546^2 + 20321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1015449157 is a prime.

It is a super-2 number, since 2×1015449157² = 2062273980904021298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015449557) 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, 507724578 + 507724579.

It is an arithmetic number, because the mean of its divisors is an integer number (507724579).

Almost surely, 2^1015449157 is an apocalyptic number.

It is an amenable number.

1015449157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015449157 is an equidigital number, since it uses as much as digits as its factorization.

1015449157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 1015449157 is about 31866.1129885651. The cubic root of 1015449157 is about 1005.1234246904.

The spelling of 1015449157 in words is "one billion, fifteen million, four hundred forty-nine thousand, one hundred fifty-seven".