1197745815 has 64 divisors (see below), whose sum is σ = 2309400576. Its totient is φ = 518234112.

The previous prime is 1197745753. The next prime is 1197745817. The reversal of 1197745815 is 5185477911.

It is not a de Polignac number, because 1197745815 - 2⁹ = 1197745303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197745817) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 231699 + ... + 236811.

It is an arithmetic number, because the mean of its divisors is an integer number (36084384).

Almost surely, 2^1197745815 is an apocalyptic number.

1197745815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1197745815 is a deficient number, since it is larger than the sum of its proper divisors (1111654761).

1197745815 is a wasteful number, since it uses less digits than its factorization.

1197745815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5248.

The product of its digits is 352800, while the sum is 48.

The square root of 1197745815 is about 34608.4644993100. The cubic root of 1197745815 is about 1061.9927551543.

The spelling of 1197745815 in words is "one billion, one hundred ninety-seven million, seven hundred forty-five thousand, eight hundred fifteen".