1153949 has 4 divisors (see below), whose sum is σ = 1167936. Its totient is φ = 1139964.

The previous prime is 1153921. The next prime is 1153967. The reversal of 1153949 is 9493511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9493511 = 263 ⋅36097.

It is a cyclic number.

It is not a de Polignac number, because 1153949 - 2¹⁶ = 1088413 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 (1153049) 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, 6869 + ... + 7034.

It is an arithmetic number, because the mean of its divisors is an integer number (291984).

2^1153949 is an apocalyptic number.

It is an amenable number.

1153949 is a deficient number, since it is larger than the sum of its proper divisors (13987).

1153949 is an equidigital number, since it uses as much as digits as its factorization.

1153949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13986.

The product of its digits is 4860, while the sum is 32.

The square root of 1153949 is about 1074.2201822718. The cubic root of 1153949 is about 104.8887408047. Note that the first 3 decimals are identical.

The spelling of 1153949 in words is "one million, one hundred fifty-three thousand, nine hundred forty-nine".