1189540 has 24 divisors (see below), whose sum is σ = 2725632. Its totient is φ = 432480.

The previous prime is 1189483. The next prime is 1189553. The reversal of 1189540 is 459811.

It is a happy number.

1189540 is nontrivially palindromic in base 8.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1189499 and 1189508.

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, 2484 + ... + 2923.

It is an arithmetic number, because the mean of its divisors is an integer number (113568).

2^1189540 is an apocalyptic number.

1189540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189540 is an abundant number, since it is smaller than the sum of its proper divisors (1536092).

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

1189540 is a wasteful number, since it uses less digits than its factorization.

1189540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427 (or 5425 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1189540 is about 1090.6603504300. The cubic root of 1189540 is about 105.9561940743.

Subtracting from 1189540 its product of nonzero digits (1440), we obtain a square (1188100 = 1090²).

It can be divided in two parts, 11895 and 40, that multiplied together give a triangular number (475800 = T₉₇₅).

The spelling of 1189540 in words is "one million, one hundred eighty-nine thousand, five hundred forty".