1201559831 has 2 divisors, whose sum is σ = 1201559832. Its totient is φ = 1201559830.

The previous prime is 1201559819. The next prime is 1201559837. The reversal of 1201559831 is 1389551021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201559831 - 2¹⁸ = 1201297687 is a prime.

It is a super-2 number, since 2×1201559831² = 2887492054945497122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201559791 and 1201559800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201559837) 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, 600779915 + 600779916.

It is an arithmetic number, because the mean of its divisors is an integer number (600779916).

Almost surely, 2^1201559831 is an apocalyptic number.

1201559831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201559831 is an equidigital number, since it uses as much as digits as its factorization.

1201559831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 1201559831 is about 34663.5230609931. The cubic root of 1201559831 is about 1063.1188053202.

The spelling of 1201559831 in words is "one billion, two hundred one million, five hundred fifty-nine thousand, eight hundred thirty-one".