1299245997 has 8 divisors (see below), whose sum is σ = 1979803456. Its totient is φ = 742426272.

The previous prime is 1299245993. The next prime is 1299245999. The reversal of 1299245997 is 7995429921.

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

It is not a de Polignac number, because 1299245997 - 2² = 1299245993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299245993) 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, 30934408 + ... + 30934449.

It is an arithmetic number, because the mean of its divisors is an integer number (247475432).

Almost surely, 2^1299245997 is an apocalyptic number.

It is an amenable number.

1299245997 is a deficient number, since it is larger than the sum of its proper divisors (680557459).

1299245997 is an equidigital number, since it uses as much as digits as its factorization.

1299245997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61868867.

The product of its digits is 3674160, while the sum is 57.

The square root of 1299245997 is about 36045.0550977523. The cubic root of 1299245997 is about 1091.1818387902.

The spelling of 1299245997 in words is "one billion, two hundred ninety-nine million, two hundred forty-five thousand, nine hundred ninety-seven".