1201880857 has 2 divisors, whose sum is σ = 1201880858. Its totient is φ = 1201880856.

The previous prime is 1201880839. The next prime is 1201880863. The reversal of 1201880857 is 7580881021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 712409481 + 489471376 = 26691^2 + 22124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201880857 - 2²³ = 1193492249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201880837) 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, 600940428 + 600940429.

It is an arithmetic number, because the mean of its divisors is an integer number (600940429).

Almost surely, 2^1201880857 is an apocalyptic number.

It is an amenable number.

1201880857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201880857 is an equidigital number, since it uses as much as digits as its factorization.

1201880857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 1201880857 is about 34668.1533543395. The cubic root of 1201880857 is about 1063.2134762578.

The spelling of 1201880857 in words is "one billion, two hundred one million, eight hundred eighty thousand, eight hundred fifty-seven".