1187155 has 8 divisors (see below), whose sum is σ = 1459584. Its totient is φ = 926400.

The previous prime is 1187141. The next prime is 1187159. The reversal of 1187155 is 5517811.

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

It is not a de Polignac number, because 1187155 - 2¹³ = 1178963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187159) 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, 2691 + ... + 3100.

It is an arithmetic number, because the mean of its divisors is an integer number (182448).

2^1187155 is an apocalyptic number.

1187155 is a deficient number, since it is larger than the sum of its proper divisors (272429).

1187155 is an equidigital number, since it uses as much as digits as its factorization.

1187155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5837.

The product of its digits is 1400, while the sum is 28.

The square root of 1187155 is about 1089.5664275298. The cubic root of 1187155 is about 105.8853334612.

The spelling of 1187155 in words is "one million, one hundred eighty-seven thousand, one hundred fifty-five".