1191625 has 8 divisors (see below), whose sum is σ = 1487304. Its totient is φ = 953200.

The previous prime is 1191613. The next prime is 1191637. The reversal of 1191625 is 5261911.

It is an interprime number because it is at equal distance from previous prime (1191613) and next prime (1191637).

It can be written as a sum of positive squares in 4 ways, for example, as 175561 + 1016064 = 419^2 + 1008^2 .

It is not a de Polignac number, because 1191625 - 2¹¹ = 1189577 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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

It is a Duffinian number.

1191625 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1191625.

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, 4642 + ... + 4891.

It is an arithmetic number, because the mean of its divisors is an integer number (185913).

2^1191625 is an apocalyptic number.

It is an amenable number.

1191625 is a deficient number, since it is larger than the sum of its proper divisors (295679).

1191625 is an frugal number, since it uses more digits than its factorization.

1191625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548 (or 9538 counting only the distinct ones).

The product of its digits is 540, while the sum is 25.

The square root of 1191625 is about 1091.6157748952. The cubic root of 1191625 is about 106.0180638492.

The spelling of 1191625 in words is "one million, one hundred ninety-one thousand, six hundred twenty-five".