1145961 has 8 divisors (see below), whose sum is σ = 1697760. Its totient is φ = 763956.

The previous prime is 1145899. The next prime is 1145971. The reversal of 1145961 is 1695411.

It is not a de Polignac number, because 1145961 - 2⁶ = 1145897 is a prime.

It is a super-2 number, since 2×1145961² = 2626453227042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 42443 = 1145961 / (1 + 1 + 4 + 5 + 9 + 6 + 1).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1145971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21195 + ... + 21248.

It is an arithmetic number, because the mean of its divisors is an integer number (212220).

2^1145961 is an apocalyptic number.

It is an amenable number.

1145961 is a deficient number, since it is larger than the sum of its proper divisors (551799).

1145961 is an equidigital number, since it uses as much as digits as its factorization.

1145961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42452 (or 42446 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1145961 is about 1070.4956795803. The cubic root of 1145961 is about 104.6461558431.

Adding to 1145961 its product of digits (1080), we get a square (1147041 = 1071²).

The spelling of 1145961 in words is "one million, one hundred forty-five thousand, nine hundred sixty-one".