1201345231 has 2 divisors, whose sum is σ = 1201345232. Its totient is φ = 1201345230.

The previous prime is 1201345217. The next prime is 1201345247. The reversal of 1201345231 is 1325431021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201345231 is a prime.

It is a super-2 number, since 2×1201345231² = 2886460728092886722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201345261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600672615 + 600672616.

It is an arithmetic number, because the mean of its divisors is an integer number (600672616).

Almost surely, 2^1201345231 is an apocalyptic number.

1201345231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201345231 is an equidigital number, since it uses as much as digits as its factorization.

1201345231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1201345231 is about 34660.4274497589. The cubic root of 1201345231 is about 1063.0555101285.

Adding to 1201345231 its reverse (1325431021), we get a palindrome (2526776252).

The spelling of 1201345231 in words is "one billion, two hundred one million, three hundred forty-five thousand, two hundred thirty-one".