1201845641 has 2 divisors, whose sum is σ = 1201845642. Its totient is φ = 1201845640.

The previous prime is 1201845629. The next prime is 1201845683. The reversal of 1201845641 is 1465481021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155660025 + 46185616 = 33995^2 + 6796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201845641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201845598 and 1201845607.

It is not a weakly prime, because it can be changed into another prime (1201845691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600922820 + 600922821.

It is an arithmetic number, because the mean of its divisors is an integer number (600922821).

Almost surely, 2^1201845641 is an apocalyptic number.

It is an amenable number.

1201845641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201845641 is an equidigital number, since it uses as much as digits as its factorization.

1201845641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1201845641 is about 34667.6454493235. The cubic root of 1201845641 is about 1063.2030918421.

The spelling of 1201845641 in words is "one billion, two hundred one million, eight hundred forty-five thousand, six hundred forty-one".