1204550491 has 4 divisors (see below), whose sum is σ = 1204777000. Its totient is φ = 1204323984.

The previous prime is 1204550489. The next prime is 1204550513. The reversal of 1204550491 is 1940554021.

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 1204550491 - 2¹ = 1204550489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1204550441) 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, 105081 + ... + 115978.

It is an arithmetic number, because the mean of its divisors is an integer number (301194250).

Almost surely, 2^1204550491 is an apocalyptic number.

1204550491 is a deficient number, since it is larger than the sum of its proper divisors (226509).

1204550491 is an equidigital number, since it uses as much as digits as its factorization.

1204550491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226508.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1204550491 is about 34706.6346827231. The cubic root of 1204550491 is about 1064.0001021704. Note that the first 3 decimals are identical.

The spelling of 1204550491 in words is "one billion, two hundred four million, five hundred fifty thousand, four hundred ninety-one".