4022781 has 8 divisors (see below), whose sum is σ = 6129984. Its totient is φ = 2298720.

The previous prime is 4022773. The next prime is 4022783. The reversal of 4022781 is 1872204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4022781 - 2³ = 4022773 is a prime.

It is a super-2 number, since 2×4022781² = 32365533947922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4022783) 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, 95760 + ... + 95801.

It is an arithmetic number, because the mean of its divisors is an integer number (766248).

Almost surely, 2^4022781 is an apocalyptic number.

It is an amenable number.

4022781 is a deficient number, since it is larger than the sum of its proper divisors (2107203).

4022781 is a wasteful number, since it uses less digits than its factorization.

4022781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191571.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 4022781 is about 2005.6871640413. The cubic root of 4022781 is about 159.0408897644.

Adding to 4022781 its reverse (1872204), we get a palindrome (5894985).

The spelling of 4022781 in words is "four million, twenty-two thousand, seven hundred eighty-one".