1201717157 has 2 divisors, whose sum is σ = 1201717158. Its totient is φ = 1201717156.

The previous prime is 1201717129. The next prime is 1201717211. The reversal of 1201717157 is 7517171021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1065434881 + 136282276 = 32641^2 + 11674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201717157 - 2¹⁰ = 1201716133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201717057) 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, 600858578 + 600858579.

It is an arithmetic number, because the mean of its divisors is an integer number (600858579).

Almost surely, 2^1201717157 is an apocalyptic number.

It is an amenable number.

1201717157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201717157 is an equidigital number, since it uses as much as digits as its factorization.

1201717157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3430, while the sum is 32.

The square root of 1201717157 is about 34665.7923174994. The cubic root of 1201717157 is about 1063.1652030457.

Adding to 1201717157 its reverse (7517171021), we get a palindrome (8718888178).

The spelling of 1201717157 in words is "one billion, two hundred one million, seven hundred seventeen thousand, one hundred fifty-seven".