4390261 has 4 divisors (see below), whose sum is σ = 4403052. Its totient is φ = 4377472.

The previous prime is 4390247. The next prime is 4390279. The reversal of 4390261 is 1620934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 799236 + 3591025 = 894^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 4390261 - 2⁵ = 4390229 is a prime.

It is a Duffinian number.

4390261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4390291) 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, 5866 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (1100763).

Almost surely, 2^4390261 is an apocalyptic number.

It is an amenable number.

4390261 is a deficient number, since it is larger than the sum of its proper divisors (12791).

4390261 is a wasteful number, since it uses less digits than its factorization.

4390261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12790.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 4390261 is about 2095.2949673017. The cubic root of 4390261 is about 163.7432652670.

The spelling of 4390261 in words is "four million, three hundred ninety thousand, two hundred sixty-one".