1201433531 has 2 divisors, whose sum is σ = 1201433532. Its totient is φ = 1201433530.

The previous prime is 1201433507. The next prime is 1201433539. The reversal of 1201433531 is 1353341021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201433531 is a prime.

It is a super-2 number, since 2×1201433531² = 2886885058822255922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201433497 and 1201433506.

It is not a weakly prime, because it can be changed into another prime (1201433539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600716765 + 600716766.

It is an arithmetic number, because the mean of its divisors is an integer number (600716766).

Almost surely, 2^1201433531 is an apocalyptic number.

1201433531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201433531 is an equidigital number, since it uses as much as digits as its factorization.

1201433531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1201433531 is about 34661.7012132988. The cubic root of 1201433531 is about 1063.0815546824.

Adding to 1201433531 its reverse (1353341021), we get a palindrome (2554774552).

The spelling of 1201433531 in words is "one billion, two hundred one million, four hundred thirty-three thousand, five hundred thirty-one".