1051257689 has 2 divisors, whose sum is σ = 1051257690. Its totient is φ = 1051257688.

The previous prime is 1051257677. The next prime is 1051257721. The reversal of 1051257689 is 9867521501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 598291600 + 452966089 = 24460^2 + 21283^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051257689 - 2⁴ = 1051257673 is a prime.

It is a super-2 number, since 2×1051257689² = 2210285457363241442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1051257659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525628844 + 525628845.

It is an arithmetic number, because the mean of its divisors is an integer number (525628845).

Almost surely, 2^1051257689 is an apocalyptic number.

It is an amenable number.

1051257689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051257689 is an equidigital number, since it uses as much as digits as its factorization.

1051257689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 44.

The square root of 1051257689 is about 32423.1042468176. The cubic root of 1051257689 is about 1016.8020077579.

The spelling of 1051257689 in words is "one billion, fifty-one million, two hundred fifty-seven thousand, six hundred eighty-nine".