1297634722 has 8 divisors (see below), whose sum is σ = 1983177756. Its totient is φ = 636575472.

The previous prime is 1297634717. The next prime is 1297634729. The reversal of 1297634722 is 2274367921.

It can be written as a sum of positive squares in 2 ways, for example, as 1062042921 + 235591801 = 32589^2 + 15349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1297634729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120813 + ... + 6121024.

Almost surely, 2^1297634722 is an apocalyptic number.

1297634722 is a deficient number, since it is larger than the sum of its proper divisors (685543034).

1297634722 is a wasteful number, since it uses less digits than its factorization.

1297634722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12241892.

The product of its digits is 254016, while the sum is 43.

The square root of 1297634722 is about 36022.6973171083. The cubic root of 1297634722 is about 1090.7305715841.

The spelling of 1297634722 in words is "one billion, two hundred ninety-seven million, six hundred thirty-four thousand, seven hundred twenty-two".