201717642 has 32 divisors (see below), whose sum is σ = 485337600. Its totient is φ = 54600048.

The previous prime is 201717641. The next prime is 201717671. The reversal of 201717642 is 246717102.

201717642 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (201717641) 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, 125592 + ... + 127187.

It is an arithmetic number, because the mean of its divisors is an integer number (15166800).

Almost surely, 2^201717642 is an apocalyptic number.

201717642 is an abundant number, since it is smaller than the sum of its proper divisors (283619958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201717642 is a wasteful number, since it uses less digits than its factorization.

201717642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252810.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 201717642 is about 14202.7336101189. The cubic root of 201717642 is about 586.4729163199.

The spelling of 201717642 in words is "two hundred one million, seven hundred seventeen thousand, six hundred forty-two".