1297243753 has 24 divisors (see below), whose sum is σ = 1493520000. Its totient is φ = 1119751776.

The previous prime is 1297243733. The next prime is 1297243777. The reversal of 1297243753 is 3573427921.

It is a de Polignac number, because none of the positive numbers 2^k-1297243753 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297243733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 368998 + ... + 372496.

It is an arithmetic number, because the mean of its divisors is an integer number (62230000).

Almost surely, 2^1297243753 is an apocalyptic number.

1297243753 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1297243753 is a deficient number, since it is larger than the sum of its proper divisors (196276247).

1297243753 is a wasteful number, since it uses less digits than its factorization.

1297243753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629 (or 3610 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The square root of 1297243753 is about 36017.2702047226. The cubic root of 1297243753 is about 1090.6210172108.

The spelling of 1297243753 in words is "one billion, two hundred ninety-seven million, two hundred forty-three thousand, seven hundred fifty-three".