1294220457 has 16 divisors (see below), whose sum is σ = 1979215360. Its totient is φ = 834980400.

The previous prime is 1294220443. The next prime is 1294220479. The reversal of 1294220457 is 7540224921.

It is not a de Polignac number, because 1294220457 - 2⁸ = 1294220201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1294220437) 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, 772294 + ... + 773967.

It is an arithmetic number, because the mean of its divisors is an integer number (123700960).

Almost surely, 2^1294220457 is an apocalyptic number.

It is an amenable number.

1294220457 is a deficient number, since it is larger than the sum of its proper divisors (684994903).

1294220457 is a wasteful number, since it uses less digits than its factorization.

1294220457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546301 (or 1546295 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1294220457 is about 35975.2756348023. The cubic root of 1294220457 is about 1089.7731079517.

The spelling of 1294220457 in words is "one billion, two hundred ninety-four million, two hundred twenty thousand, four hundred fifty-seven".