1296497658 has 16 divisors (see below), whose sum is σ = 2593357056. Its totient is φ = 432105600.

The previous prime is 1296497647. The next prime is 1296497659. The reversal of 1296497658 is 8567946921.

It is a junction number, because it is equal to n+sod(n) for n = 1296497598 and 1296497607.

It is not an unprimeable number, because it can be changed into a prime (1296497659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61258 + ... + 79658.

It is an arithmetic number, because the mean of its divisors is an integer number (162084816).

Almost surely, 2^1296497658 is an apocalyptic number.

1296497658 is an abundant number, since it is smaller than the sum of its proper divisors (1296859398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296497658 is a wasteful number, since it uses less digits than its factorization.

1296497658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30149.

The product of its digits is 6531840, while the sum is 57.

The square root of 1296497658 is about 36006.9112532580. The cubic root of 1296497658 is about 1090.4118910195.

The spelling of 1296497658 in words is "one billion, two hundred ninety-six million, four hundred ninety-seven thousand, six hundred fifty-eight".