1201203491 has 2 divisors, whose sum is σ = 1201203492. Its totient is φ = 1201203490.

The previous prime is 1201203449. The next prime is 1201203517. The reversal of 1201203491 is 1943021021.

It is a strong prime.

It is an emirp because it is prime and its reverse (1943021021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201203491 - 2¹⁴ = 1201187107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201203431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600601745 + 600601746.

It is an arithmetic number, because the mean of its divisors is an integer number (600601746).

Almost surely, 2^1201203491 is an apocalyptic number.

1201203491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201203491 is an equidigital number, since it uses as much as digits as its factorization.

1201203491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1201203491 is about 34658.3826945228. The cubic root of 1201203491 is about 1063.0137004943.

The spelling of 1201203491 in words is "one billion, two hundred one million, two hundred three thousand, four hundred ninety-one".