1166340421 has 4 divisors (see below), whose sum is σ = 1167120000. Its totient is φ = 1165560844.

The previous prime is 1166340367. The next prime is 1166340443. The reversal of 1166340421 is 1240436611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1166340421 - 2⁷ = 1166340293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1166340421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166340451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387541 + ... + 390538.

It is an arithmetic number, because the mean of its divisors is an integer number (291780000).

Almost surely, 2^1166340421 is an apocalyptic number.

It is an amenable number.

1166340421 is a deficient number, since it is larger than the sum of its proper divisors (779579).

1166340421 is an equidigital number, since it uses as much as digits as its factorization.

1166340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779578.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1166340421 is about 34151.7264717320. The cubic root of 1166340421 is about 1052.6284626065.

The spelling of 1166340421 in words is "one billion, one hundred sixty-six million, three hundred forty thousand, four hundred twenty-one".