1155361 has 4 divisors (see below), whose sum is σ = 1157824. Its totient is φ = 1152900.

The previous prime is 1155317. The next prime is 1155373. The reversal of 1155361 is 1635511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1635511 = 37 ⋅44203.

It is a cyclic number.

It is not a de Polignac number, because 1155361 - 2⁷ = 1155233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285 + ... + 1546.

It is an arithmetic number, because the mean of its divisors is an integer number (289456).

2^1155361 is an apocalyptic number.

It is an amenable number.

1155361 is a deficient number, since it is larger than the sum of its proper divisors (2463).

1155361 is an equidigital number, since it uses as much as digits as its factorization.

1155361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462.

The product of its digits is 450, while the sum is 22.

The square root of 1155361 is about 1074.8772022887. The cubic root of 1155361 is about 104.9315048366.

It can be divided in two parts, 115 and 5361, that added together give a square (5476 = 74²).

The spelling of 1155361 in words is "one million, one hundred fifty-five thousand, three hundred sixty-one".