4280781 has 4 divisors (see below), whose sum is σ = 5707712. Its totient is φ = 2853852.

The previous prime is 4280767. The next prime is 4280827. The reversal of 4280781 is 1870824.

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 not a de Polignac number, because 4280781 - 2¹⁰ = 4279757 is a prime.

It is a super-2 number, since 2×4280781² = 36650171939922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4280741) 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, 713461 + ... + 713466.

It is an arithmetic number, because the mean of its divisors is an integer number (1426928).

Almost surely, 2^4280781 is an apocalyptic number.

It is an amenable number.

4280781 is a deficient number, since it is larger than the sum of its proper divisors (1426931).

4280781 is a wasteful number, since it uses less digits than its factorization.

4280781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426930.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 4280781 is about 2069.0048332471. The cubic root of 4280781 is about 162.3707026712.

The spelling of 4280781 in words is "four million, two hundred eighty thousand, seven hundred eighty-one".