1118770421 has 4 divisors (see below), whose sum is σ = 1118924844. Its totient is φ = 1118616000.

The previous prime is 1118770409. The next prime is 1118770451. The reversal of 1118770421 is 1240778111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1020483025 + 98287396 = 31945^2 + 9914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118770421 - 2²⁶ = 1051661557 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 (1118770451) 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, 65780 + ... + 81021.

It is an arithmetic number, because the mean of its divisors is an integer number (279731211).

Almost surely, 2^1118770421 is an apocalyptic number.

It is an amenable number.

1118770421 is a deficient number, since it is larger than the sum of its proper divisors (154423).

1118770421 is an equidigital number, since it uses as much as digits as its factorization.

1118770421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154422.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 1118770421 is about 33448.0256666967. The cubic root of 1118770421 is about 1038.1186465878.

The spelling of 1118770421 in words is "one billion, one hundred eighteen million, seven hundred seventy thousand, four hundred twenty-one".