1297445738 has 32 divisors (see below), whose sum is σ = 2032128000. Its totient is φ = 620801280.

The previous prime is 1297445731. The next prime is 1297445753. The reversal of 1297445738 is 8375447921.

It is not an unprimeable number, because it can be changed into a prime (1297445731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013783 + ... + 1015061.

It is an arithmetic number, because the mean of its divisors is an integer number (63504000).

Almost surely, 2^1297445738 is an apocalyptic number.

1297445738 is a deficient number, since it is larger than the sum of its proper divisors (734682262).

1297445738 is a wasteful number, since it uses less digits than its factorization.

1297445738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550.

The product of its digits is 1693440, while the sum is 50.

The square root of 1297445738 is about 36020.0740976473. The cubic root of 1297445738 is about 1090.6776186664.

The spelling of 1297445738 in words is "one billion, two hundred ninety-seven million, four hundred forty-five thousand, seven hundred thirty-eight".