1149258209 has 4 divisors (see below), whose sum is σ = 1253736240. Its totient is φ = 1044780180.

The previous prime is 1149258161. The next prime is 1149258211. The reversal of 1149258209 is 9028529411.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1149258209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1149257209) 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, 52238999 + ... + 52239020.

It is an arithmetic number, because the mean of its divisors is an integer number (313434060).

Almost surely, 2^1149258209 is an apocalyptic number.

It is an amenable number.

1149258209 is a deficient number, since it is larger than the sum of its proper divisors (104478031).

1149258209 is a wasteful number, since it uses less digits than its factorization.

1149258209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104478030.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 1149258209 is about 33900.7110397407. The cubic root of 1149258209 is about 1047.4642390147.

The spelling of 1149258209 in words is "one billion, one hundred forty-nine million, two hundred fifty-eight thousand, two hundred nine".