1121545169 has 2 divisors, whose sum is σ = 1121545170. Its totient is φ = 1121545168.

The previous prime is 1121545163. The next prime is 1121545177. The reversal of 1121545169 is 9615451211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079451025 + 42094144 = 32855^2 + 6488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121545169 - 2⁸ = 1121544913 is a prime.

It is a super-2 number, since 2×1121545169² = 2515727132214477122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1121545163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560772584 + 560772585.

It is an arithmetic number, because the mean of its divisors is an integer number (560772585).

Almost surely, 2^1121545169 is an apocalyptic number.

It is an amenable number.

1121545169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121545169 is an equidigital number, since it uses as much as digits as its factorization.

1121545169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 35.

The square root of 1121545169 is about 33489.4784820546. The cubic root of 1121545169 is about 1038.9761771598.

The spelling of 1121545169 in words is "one billion, one hundred twenty-one million, five hundred forty-five thousand, one hundred sixty-nine".