40254421 has 2 divisors, whose sum is σ = 40254422. Its totient is φ = 40254420.

The previous prime is 40254397. The next prime is 40254427. The reversal of 40254421 is 12445204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36602500 + 3651921 = 6050^2 + 1911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40254421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40254392 and 40254401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40254427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20127210 + 20127211.

It is an arithmetic number, because the mean of its divisors is an integer number (20127211).

Almost surely, 2^40254421 is an apocalyptic number.

It is an amenable number.

40254421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40254421 is an equidigital number, since it uses as much as digits as its factorization.

40254421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40254421 is about 6344.6371842683. The cubic root of 40254421 is about 342.7187470783.

Adding to 40254421 its reverse (12445204), we get a palindrome (52699625).

The spelling of 40254421 in words is "forty million, two hundred fifty-four thousand, four hundred twenty-one".