1297720058 has 16 divisors (see below), whose sum is σ = 2064458664. Its totient is φ = 609692160.

The previous prime is 1297720057. The next prime is 1297720063. The reversal of 1297720058 is 8500277921.

It can be written as a sum of positive squares in 4 ways, for example, as 884289169 + 413430889 = 29737^2 + 20333^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1297719997 and 1297720024.

It is not an unprimeable number, because it can be changed into a prime (1297720057) 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 7 ways as a sum of consecutive naturals, for example, 9953 + ... + 51908.

Almost surely, 2^1297720058 is an apocalyptic number.

1297720058 is a deficient number, since it is larger than the sum of its proper divisors (766738606).

1297720058 is a wasteful number, since it uses less digits than its factorization.

1297720058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62497.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 1297720058 is about 36023.8817730683. The cubic root of 1297720058 is about 1090.7544808661.

Adding to 1297720058 its reverse (8500277921), we get a palindrome (9797997979).

The spelling of 1297720058 in words is "one billion, two hundred ninety-seven million, seven hundred twenty thousand, fifty-eight".