1187255 has 8 divisors (see below), whose sum is σ = 1439424. Its totient is φ = 940000.

The previous prime is 1187239. The next prime is 1187261. The reversal of 1187255 is 5527811.

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

It is not a de Polignac number, because 1187255 - 2⁴ = 1187239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671 + ... + 1680.

It is an arithmetic number, because the mean of its divisors is an integer number (179928).

2^1187255 is an apocalyptic number.

1187255 is a deficient number, since it is larger than the sum of its proper divisors (252169).

1187255 is a wasteful number, since it uses less digits than its factorization.

1187255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457.

The product of its digits is 2800, while the sum is 29.

The square root of 1187255 is about 1089.6123163768. The cubic root of 1187255 is about 105.8883064614. Note that the first 3 decimals are identical.

It can be divided in two parts, 11 and 87255, that multiplied together give a triangular number (959805 = T₁₃₈₅).

The spelling of 1187255 in words is "one million, one hundred eighty-seven thousand, two hundred fifty-five".