40234421 has 2 divisors, whose sum is σ = 40234422. Its totient is φ = 40234420.

The previous prime is 40234399. The next prime is 40234433. The reversal of 40234421 is 12443204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29311396 + 10923025 = 5414^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 40234421 - 2¹⁴ = 40218037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40234393 and 40234402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40234471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20117210 + 20117211.

It is an arithmetic number, because the mean of its divisors is an integer number (20117211).

Almost surely, 2^40234421 is an apocalyptic number.

It is an amenable number.

40234421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40234421 is an equidigital number, since it uses as much as digits as its factorization.

40234421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40234421 is about 6343.0608541933. The cubic root of 40234421 is about 342.6619789001.

Adding to 40234421 its reverse (12443204), we get a palindrome (52677625).

The spelling of 40234421 in words is "forty million, two hundred thirty-four thousand, four hundred twenty-one".