1283294257 has 16 divisors (see below), whose sum is σ = 1565568000. Its totient is φ = 1027388880.

The previous prime is 1283294239. The next prime is 1283294263. The reversal of 1283294257 is 7524923821.

It is not a de Polignac number, because 1283294257 - 2²³ = 1274905649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1283294227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58507 + ... + 77392.

It is an arithmetic number, because the mean of its divisors is an integer number (97848000).

Almost surely, 2^1283294257 is an apocalyptic number.

It is an amenable number.

1283294257 is a deficient number, since it is larger than the sum of its proper divisors (282273743).

1283294257 is a wasteful number, since it uses less digits than its factorization.

1283294257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135996.

The product of its digits is 241920, while the sum is 43.

The square root of 1283294257 is about 35823.0966975218. The cubic root of 1283294257 is about 1086.6977059125.

The spelling of 1283294257 in words is "one billion, two hundred eighty-three million, two hundred ninety-four thousand, two hundred fifty-seven".