1155356461 has 4 divisors (see below), whose sum is σ = 1320407392. Its totient is φ = 990305532.

The previous prime is 1155356441. The next prime is 1155356513. The reversal of 1155356461 is 1646535511.

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 1155356461 - 2⁵ = 1155356429 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 1155356461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155356441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82525455 + ... + 82525468.

It is an arithmetic number, because the mean of its divisors is an integer number (330101848).

Almost surely, 2^1155356461 is an apocalyptic number.

It is an amenable number.

1155356461 is a deficient number, since it is larger than the sum of its proper divisors (165050931).

1155356461 is an equidigital number, since it uses as much as digits as its factorization.

1155356461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165050930.

The product of its digits is 54000, while the sum is 37.

The square root of 1155356461 is about 33990.5348736968. The cubic root of 1155356461 is about 1049.3136742366.

The spelling of 1155356461 in words is "one billion, one hundred fifty-five million, three hundred fifty-six thousand, four hundred sixty-one".