1187972 has 24 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 566720.

The previous prime is 1187947. The next prime is 1187981. The reversal of 1187972 is 2797811.

It is a super-2 number, since 2×1187972² = 2822554945568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13304 + ... + 13392.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2^1187972 is an apocalyptic number.

It is an amenable number.

1187972 is a deficient number, since it is larger than the sum of its proper divisors (989308).

1187972 is a wasteful number, since it uses less digits than its factorization.

1187972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 209 counting only the distinct ones).

The product of its digits is 7056, while the sum is 35.

The square root of 1187972 is about 1089.9412828222. The cubic root of 1187972 is about 105.9096179846.

The spelling of 1187972 in words is "one million, one hundred eighty-seven thousand, nine hundred seventy-two".