1161615 has 64 divisors (see below), whose sum is σ = 2451456. Its totient is φ = 456192.

The previous prime is 1161599. The next prime is 1161617. The reversal of 1161615 is 5161611.

It is not a de Polignac number, because 1161615 - 2⁴ = 1161599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1161591 and 1161600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161617) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31377 + ... + 31413.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2^1161615 is an apocalyptic number.

1161615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161615 is an abundant number, since it is smaller than the sum of its proper divisors (1289841).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161615 is a wasteful number, since it uses less digits than its factorization.

1161615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88.

The product of its digits is 180, while the sum is 21.

The square root of 1161615 is about 1077.7824455798. The cubic root of 1161615 is about 105.1204965875.

The spelling of 1161615 in words is "one million, one hundred sixty-one thousand, six hundred fifteen".