1872051243 has 4 divisors (see below), whose sum is σ = 2496068328. Its totient is φ = 1248034160.

The previous prime is 1872051241. The next prime is 1872051253. The reversal of 1872051243 is 3421502781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1872051243 - 2¹ = 1872051241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1872051241) 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, 312008538 + ... + 312008543.

It is an arithmetic number, because the mean of its divisors is an integer number (624017082).

Almost surely, 2^1872051243 is an apocalyptic number.

1872051243 is a deficient number, since it is larger than the sum of its proper divisors (624017085).

1872051243 is an equidigital number, since it uses as much as digits as its factorization.

1872051243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624017084.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1872051243 is about 43267.2074786437. The cubic root of 1872051243 is about 1232.4592748771.

The spelling of 1872051243 in words is "one billion, eight hundred seventy-two million, fifty-one thousand, two hundred forty-three".