1166425 has 24 divisors (see below), whose sum is σ = 1616216. Its totient is φ = 829440.

The previous prime is 1166413. The next prime is 1166441. The reversal of 1166425 is 5246611.

It can be written as a sum of positive squares in 12 ways, for example, as 295936 + 870489 = 544^2 + 933^2 .

It is not a de Polignac number, because 1166425 - 2⁵ = 1166393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1166425.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11977 + ... + 12073.

2^1166425 is an apocalyptic number.

It is an amenable number.

1166425 is a deficient number, since it is larger than the sum of its proper divisors (449791).

1166425 is a wasteful number, since it uses less digits than its factorization.

1166425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 152 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1166425 is about 1080.0115740121. The cubic root of 1166425 is about 105.2653906325.

Subtracting from 1166425 its sum of digits (25), we obtain a square (1166400 = 1080²).

It can be divided in two parts, 11664 and 25, that multiplied together give a square (291600 = 540²).

The spelling of 1166425 in words is "one million, one hundred sixty-six thousand, four hundred twenty-five".