122001591 has 16 divisors (see below), whose sum is σ = 170012160. Its totient is φ = 77674080.

The previous prime is 122001589. The next prime is 122001611. The reversal of 122001591 is 195100221.

It is not a de Polignac number, because 122001591 - 2¹ = 122001589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122001511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63990 + ... + 65868.

It is an arithmetic number, because the mean of its divisors is an integer number (10625760).

Almost surely, 2^122001591 is an apocalyptic number.

122001591 is a deficient number, since it is larger than the sum of its proper divisors (48010569).

122001591 is a wasteful number, since it uses less digits than its factorization.

122001591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 122001591 is about 11045.4330381384. The cubic root of 122001591 is about 495.9697223432.

The spelling of 122001591 in words is "one hundred twenty-two million, one thousand, five hundred ninety-one".