1187045 has 4 divisors (see below), whose sum is σ = 1424460. Its totient is φ = 949632.

The previous prime is 1187023. The next prime is 1187047. The reversal of 1187045 is 5407811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5407811 = 131 ⋅41281.

It can be written as a sum of positive squares in 2 ways, for example, as 351649 + 835396 = 593^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1187045 - 2⁶ = 1186981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118700 + ... + 118709.

It is an arithmetic number, because the mean of its divisors is an integer number (356115).

2^1187045 is an apocalyptic number.

It is an amenable number.

1187045 is a deficient number, since it is larger than the sum of its proper divisors (237415).

1187045 is an equidigital number, since it uses as much as digits as its factorization.

1187045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237414.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 1187045 is about 1089.5159475657. The cubic root of 1187045 is about 105.8820629682.

The spelling of 1187045 in words is "one million, one hundred eighty-seven thousand, forty-five".