40134421 has 2 divisors, whose sum is σ = 40134422. Its totient is φ = 40134420.

The previous prime is 40134373. The next prime is 40134431. The reversal of 40134421 is 12443104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33814225 + 6320196 = 5815^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 40134421 - 2¹⁵ = 40101653 is a prime.

It is a super-2 number, since 2×40134421² = 3221543498010482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40134431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20067210 + 20067211.

It is an arithmetic number, because the mean of its divisors is an integer number (20067211).

Almost surely, 2^40134421 is an apocalyptic number.

It is an amenable number.

40134421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40134421 is an equidigital number, since it uses as much as digits as its factorization.

40134421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40134421 is about 6335.1733204388. The cubic root of 40134421 is about 342.3778554631.

Adding to 40134421 its reverse (12443104), we get a palindrome (52577525).

The spelling of 40134421 in words is "forty million, one hundred thirty-four thousand, four hundred twenty-one".