201421794 has 16 divisors (see below), whose sum is σ = 460392768. Its totient is φ = 57549072.

The previous prime is 201421789. The next prime is 201421799. The reversal of 201421794 is 497124102.

It is an interprime number because it is at equal distance from previous prime (201421789) and next prime (201421799).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201421799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2397837 + ... + 2397920.

It is an arithmetic number, because the mean of its divisors is an integer number (28774548).

Almost surely, 2^201421794 is an apocalyptic number.

201421794 is an abundant number, since it is smaller than the sum of its proper divisors (258970974).

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

201421794 is a wasteful number, since it uses less digits than its factorization.

201421794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795769.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 201421794 is about 14192.3146103798. The cubic root of 201421794 is about 586.1860603446.

Adding to 201421794 its reverse (497124102), we get a palindrome (698545896).

The spelling of 201421794 in words is "two hundred one million, four hundred twenty-one thousand, seven hundred ninety-four".