2251439 has 4 divisors (see below), whose sum is σ = 2254920.
Its totient is φ = 2247960.
The previous prime is 2251427. The next prime is 2251451. The reversal of 2251439 is 9341522.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (2251427) and next prime (2251451).
It is a cyclic number.
It is not a de Polignac number, because 2251439 - 24 = 2251423 is a prime.
It is a Duffinian number.
It is a plaindrome in base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2251489) 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, 452 + ... + 2169.
It is an arithmetic number, because the mean of its divisors is an integer number (563730).
22251439 is an apocalyptic number.
2251439 is a deficient number, since it is larger than the sum of its proper divisors (3481).
2251439 is an equidigital number, since it uses as much as digits as its factorization.
2251439 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3480.
The product of its digits is 2160, while the sum is 26.
The square root of 2251439 is about 1500.4795899978.
The cubic root of 2251439 is about 131.0649989192.
The spelling of 2251439 in words is "two million, two hundred fifty-one thousand, four hundred thirty-nine".