1156420166 has 16 divisors (see below), whose sum is σ = 1894837968. Its totient is φ = 524947200.

The previous prime is 1156420157. The next prime is 1156420171. The reversal of 1156420166 is 6610246511.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17795 + ... + 51278.

It is an arithmetic number, because the mean of its divisors is an integer number (118427373).

Almost surely, 2^1156420166 is an apocalyptic number.

1156420166 is a deficient number, since it is larger than the sum of its proper divisors (738417802).

1156420166 is a wasteful number, since it uses less digits than its factorization.

1156420166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69847.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1156420166 is about 34006.1783504116. The cubic root of 1156420166 is about 1049.6356002324.

Adding to 1156420166 its reverse (6610246511), we get a palindrome (7766666677).

The spelling of 1156420166 in words is "one billion, one hundred fifty-six million, four hundred twenty thousand, one hundred sixty-six".