40421503 has 2 divisors, whose sum is σ = 40421504. Its totient is φ = 40421502.

The previous prime is 40421483. The next prime is 40421509. The reversal of 40421503 is 30512404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40421503 - 2⁵ = 40421471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40421509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210751 + 20210752.

It is an arithmetic number, because the mean of its divisors is an integer number (20210752).

Almost surely, 2^40421503 is an apocalyptic number.

40421503 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421503 is an equidigital number, since it uses as much as digits as its factorization.

40421503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40421503 is about 6357.7907326366. The cubic root of 40421503 is about 343.1922610381.

Adding to 40421503 its reverse (30512404), we get a palindrome (70933907).

Subtracting from 40421503 its reverse (30512404), we obtain a palindrome (9909099).

The spelling of 40421503 in words is "forty million, four hundred twenty-one thousand, five hundred three".