40421493 has 24 divisors (see below), whose sum is σ = 70241600. Its totient is φ = 21881664.

The previous prime is 40421483. The next prime is 40421503. The reversal of 40421493 is 39412404.

It is an interprime number because it is at equal distance from previous prime (40421483) and next prime (40421503).

It is not a de Polignac number, because 40421493 - 2¹⁴ = 40405109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15688 + ... + 18081.

Almost surely, 2^40421493 is an apocalyptic number.

It is an amenable number.

40421493 is a deficient number, since it is larger than the sum of its proper divisors (29820107).

40421493 is a wasteful number, since it uses less digits than its factorization.

40421493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33801 (or 33798 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40421493 is about 6357.7899461999. The cubic root of 40421493 is about 343.1922327370.

Adding to 40421493 its reverse (39412404), we get a palindrome (79833897).

The spelling of 40421493 in words is "forty million, four hundred twenty-one thousand, four hundred ninety-three".