1372556243 has 4 divisors (see below), whose sum is σ = 1372645488. Its totient is φ = 1372467000.

The previous prime is 1372556239. The next prime is 1372556261. The reversal of 1372556243 is 3426552731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3426552731 = 7 ⋅489507533.

It is a cyclic number.

It is not a de Polignac number, because 1372556243 - 2² = 1372556239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1372556197 and 1372556206.

It is not an unprimeable number, because it can be changed into a prime (1372556543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14996 + ... + 54497.

It is an arithmetic number, because the mean of its divisors is an integer number (343161372).

Almost surely, 2^1372556243 is an apocalyptic number.

1372556243 is a deficient number, since it is larger than the sum of its proper divisors (89245).

1372556243 is an equidigital number, since it uses as much as digits as its factorization.

1372556243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89244.

The product of its digits is 151200, while the sum is 38.

The square root of 1372556243 is about 37048.0261687448. The cubic root of 1372556243 is about 1111.3308828782.

The spelling of 1372556243 in words is "one billion, three hundred seventy-two million, five hundred fifty-six thousand, two hundred forty-three".