1172645 has 4 divisors (see below), whose sum is σ = 1407180. Its totient is φ = 938112.

The previous prime is 1172579. The next prime is 1172657. The reversal of 1172645 is 5462711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5462711 = 67 ⋅81533.

It can be written as a sum of positive squares in 2 ways, for example, as 277729 + 894916 = 527^2 + 946^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172645 - 2¹⁴ = 1156261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117260 + ... + 117269.

It is an arithmetic number, because the mean of its divisors is an integer number (351795).

2^1172645 is an apocalyptic number.

It is an amenable number.

1172645 is a deficient number, since it is larger than the sum of its proper divisors (234535).

1172645 is an equidigital number, since it uses as much as digits as its factorization.

1172645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234534.

The product of its digits is 1680, while the sum is 26.

The square root of 1172645 is about 1082.8873440945. The cubic root of 1172645 is about 105.4521694191.

The spelling of 1172645 in words is "one million, one hundred seventy-two thousand, six hundred forty-five".