1245298257 has 12 divisors (see below), whose sum is σ = 2055730560. Its totient is φ = 711598968.

The previous prime is 1245298199. The next prime is 1245298277. The reversal of 1245298257 is 7528925421.

It is not a de Polignac number, because 1245298257 - 2⁷ = 1245298129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245298277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9883257 + ... + 9883382.

It is an arithmetic number, because the mean of its divisors is an integer number (171310880).

Almost surely, 2^1245298257 is an apocalyptic number.

It is an amenable number.

1245298257 is a deficient number, since it is larger than the sum of its proper divisors (810432303).

1245298257 is a wasteful number, since it uses less digits than its factorization.

1245298257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19766652 (or 19766649 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 1245298257 is about 35288.7837279779. The cubic root of 1245298257 is about 1075.8650349759.

The spelling of 1245298257 in words is "one billion, two hundred forty-five million, two hundred ninety-eight thousand, two hundred fifty-seven".