1161563 has 8 divisors (see below), whose sum is σ = 1260000. Its totient is φ = 1064448.

The previous prime is 1161553. The next prime is 1161581. The reversal of 1161563 is 3651611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161563 - 2⁴ = 1161547 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1161553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2363 + ... + 2811.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^1161563 is an apocalyptic number.

1161563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1161563 is a deficient number, since it is larger than the sum of its proper divisors (98437).

1161563 is a wasteful number, since it uses less digits than its factorization.

1161563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661.

The product of its digits is 540, while the sum is 23.

The square root of 1161563 is about 1077.7583217030. The cubic root of 1161563 is about 105.1189279819.

The spelling of 1161563 in words is "one million, one hundred sixty-one thousand, five hundred sixty-three".