1205451231 has 16 divisors (see below), whose sum is σ = 1657651200. Its totient is φ = 778625568.

The previous prime is 1205451217. The next prime is 1205451251. The reversal of 1205451231 is 1321545021.

It is a happy number.

It is not a de Polignac number, because 1205451231 - 2⁵ = 1205451199 is a prime.

It is a super-2 number, since 2×1205451231² = 2906225340638830722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205451211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3810 + ... + 49248.

It is an arithmetic number, because the mean of its divisors is an integer number (103603200).

Almost surely, 2^1205451231 is an apocalyptic number.

1205451231 is a deficient number, since it is larger than the sum of its proper divisors (452199969).

1205451231 is a wasteful number, since it uses less digits than its factorization.

1205451231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45718.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1205451231 is about 34719.6087391549. The cubic root of 1205451231 is about 1064.2652491195.

Adding to 1205451231 its reverse (1321545021), we get a palindrome (2526996252).

The spelling of 1205451231 in words is "one billion, two hundred five million, four hundred fifty-one thousand, two hundred thirty-one".