40232421 has 12 divisors (see below), whose sum is σ = 61532172. Its totient is φ = 25243776.

The previous prime is 40232419. The next prime is 40232429. The reversal of 40232421 is 12423204.

It can be written as a sum of positive squares in 2 ways, for example, as 11492100 + 28740321 = 3390^2 + 5361^2 .

It is not a de Polignac number, because 40232421 - 2¹ = 40232419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40232394 and 40232403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40232429) 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, 131326 + ... + 131631.

It is an arithmetic number, because the mean of its divisors is an integer number (5127681).

Almost surely, 2^40232421 is an apocalyptic number.

It is an amenable number.

40232421 is a deficient number, since it is larger than the sum of its proper divisors (21299751).

40232421 is a wasteful number, since it uses less digits than its factorization.

40232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262980 (or 262977 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40232421 is about 6342.9031996397. The cubic root of 40232421 is about 342.6563010477.

Adding to 40232421 its reverse (12423204), we get a palindrome (52655625).

It can be divided in two parts, 402 and 32421, that added together give a palindrome (32823).

The spelling of 40232421 in words is "forty million, two hundred thirty-two thousand, four hundred twenty-one".