1172399 has 4 divisors (see below), whose sum is σ = 1183464. Its totient is φ = 1161336.

The previous prime is 1172393. The next prime is 1172401. The reversal of 1172399 is 9932711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9932711 = 23 ⋅431857.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5372 + ... + 5585.

It is an arithmetic number, because the mean of its divisors is an integer number (295866).

2^1172399 is an apocalyptic number.

1172399 is a deficient number, since it is larger than the sum of its proper divisors (11065).

1172399 is a wasteful number, since it uses less digits than its factorization.

1172399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064.

The product of its digits is 3402, while the sum is 32.

The square root of 1172399 is about 1082.7737529142. The cubic root of 1172399 is about 105.4447949088. Note that the first 3 decimals are identical.

The spelling of 1172399 in words is "one million, one hundred seventy-two thousand, three hundred ninety-nine".