40113421 has 12 divisors (see below), whose sum is σ = 43480476. Its totient is φ = 36865920.

The previous prime is 40113413. The next prime is 40113461. The reversal of 40113421 is 12431104.

40113421 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 30096196 + 10017225 = 5486^2 + 3165^2 .

It is not a de Polignac number, because 40113421 - 2³ = 40113413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40113395 and 40113404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40113461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190006 + ... + 190216.

It is an arithmetic number, because the mean of its divisors is an integer number (3623373).

Almost surely, 2^40113421 is an apocalyptic number.

It is an amenable number.

40113421 is a deficient number, since it is larger than the sum of its proper divisors (3367055).

40113421 is an equidigital number, since it uses as much as digits as its factorization.

40113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 40113421 is about 6333.5156903571. The cubic root of 40113421 is about 342.3181295954.

Adding to 40113421 its reverse (12431104), we get a palindrome (52544525).

The spelling of 40113421 in words is "forty million, one hundred thirteen thousand, four hundred twenty-one".