440254421 has 2 divisors, whose sum is σ = 440254422. Its totient is φ = 440254420.

The previous prime is 440254403. The next prime is 440254429. The reversal of 440254421 is 124452044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303247396 + 137007025 = 17414^2 + 11705^2 .

It is a cyclic number.

It is not a de Polignac number, because 440254421 - 2⁶ = 440254357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440254429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220127210 + 220127211.

It is an arithmetic number, because the mean of its divisors is an integer number (220127211).

Almost surely, 2^440254421 is an apocalyptic number.

It is an amenable number.

440254421 is a deficient number, since it is larger than the sum of its proper divisors (1).

440254421 is an equidigital number, since it uses as much as digits as its factorization.

440254421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 440254421 is about 20982.2406096203. The cubic root of 440254421 is about 760.7370625370.

The spelling of 440254421 in words is "four hundred forty million, two hundred fifty-four thousand, four hundred twenty-one".