4572781 has 4 divisors (see below), whose sum is σ = 4590432. Its totient is φ = 4555132.

The previous prime is 4572767. The next prime is 4572803. The reversal of 4572781 is 1872754.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4572781 - 2¹³ = 4564589 is a prime.

It is a super-2 number, since 2×4572781² = 41820652147922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4572721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8431 + ... + 8956.

It is an arithmetic number, because the mean of its divisors is an integer number (1147608).

Almost surely, 2^4572781 is an apocalyptic number.

It is an amenable number.

4572781 is a deficient number, since it is larger than the sum of its proper divisors (17651).

4572781 is a wasteful number, since it uses less digits than its factorization.

4572781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17650.

The product of its digits is 15680, while the sum is 34.

The square root of 4572781 is about 2138.4061821834. The cubic root of 4572781 is about 165.9816716591.

The spelling of 4572781 in words is "four million, five hundred seventy-two thousand, seven hundred eighty-one".