1154999 has 4 divisors (see below), whose sum is σ = 1162800. Its totient is φ = 1147200.

The previous prime is 1154987. The next prime is 1155001. The reversal of 1154999 is 9994511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1154999 - 2¹⁶ = 1089463 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 (1154969) 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, 3674 + ... + 3975.

It is an arithmetic number, because the mean of its divisors is an integer number (290700).

2^1154999 is an apocalyptic number.

1154999 is a deficient number, since it is larger than the sum of its proper divisors (7801).

1154999 is an equidigital number, since it uses as much as digits as its factorization.

1154999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800.

The product of its digits is 14580, while the sum is 38.

The square root of 1154999 is about 1074.7087977680. The cubic root of 1154999 is about 104.9205445761.

The spelling of 1154999 in words is "one million, one hundred fifty-four thousand, nine hundred ninety-nine".