1025742169 has 2 divisors, whose sum is σ = 1025742170. Its totient is φ = 1025742168.

The previous prime is 1025742131. The next prime is 1025742181. The reversal of 1025742169 is 9612475201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 728352144 + 297390025 = 26988^2 + 17245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025742169 - 2²⁵ = 992187737 is a prime.

It is a super-2 number, since 2×1025742169² = 2104293994529649122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1025742119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512871084 + 512871085.

It is an arithmetic number, because the mean of its divisors is an integer number (512871085).

Almost surely, 2^1025742169 is an apocalyptic number.

It is an amenable number.

1025742169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025742169 is an equidigital number, since it uses as much as digits as its factorization.

1025742169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1025742169 is about 32027.2098222746. The cubic root of 1025742169 is about 1008.5081294372.

The spelling of 1025742169 in words is "one billion, twenty-five million, seven hundred forty-two thousand, one hundred sixty-nine".