1372218345 has 24 divisors (see below), whose sum is σ = 2429122176. Its totient is φ = 716277408.

The previous prime is 1372218329. The next prime is 1372218373. The reversal of 1372218345 is 5438122731.

It is not a de Polignac number, because 1372218345 - 2⁴ = 1372218329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322287 + ... + 326516.

It is an arithmetic number, because the mean of its divisors is an integer number (101213424).

Almost surely, 2^1372218345 is an apocalyptic number.

1372218345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1372218345 is a deficient number, since it is larger than the sum of its proper divisors (1056903831).

1372218345 is a wasteful number, since it uses less digits than its factorization.

1372218345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648861 (or 648858 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 1372218345 is about 37043.4656181087. The cubic root of 1372218345 is about 1111.2396790134.

The spelling of 1372218345 in words is "one billion, three hundred seventy-two million, two hundred eighteen thousand, three hundred forty-five".