1025457457 has 2 divisors, whose sum is σ = 1025457458. Its totient is φ = 1025457456.

The previous prime is 1025457431. The next prime is 1025457481. The reversal of 1025457457 is 7547545201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587141361 + 438316096 = 24231^2 + 20936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025457457 - 2¹⁵ = 1025424689 is a prime.

It is a super-2 number, since 2×1025457457² = 2103125992233813698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1025457427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512728728 + 512728729.

It is an arithmetic number, because the mean of its divisors is an integer number (512728729).

Almost surely, 2^1025457457 is an apocalyptic number.

It is an amenable number.

1025457457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025457457 is an equidigital number, since it uses as much as digits as its factorization.

1025457457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196000, while the sum is 40.

The square root of 1025457457 is about 32022.7646682793. The cubic root of 1025457457 is about 1008.4148113353.

The spelling of 1025457457 in words is "one billion, twenty-five million, four hundred fifty-seven thousand, four hundred fifty-seven".