40124213 has 4 divisors (see below), whose sum is σ = 41868768. Its totient is φ = 38379660.

The previous prime is 40124207. The next prime is 40124221. The reversal of 40124213 is 31242104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40124213 - 2¹⁰ = 40123189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40124191 and 40124200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40124263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872243 + ... + 872288.

It is an arithmetic number, because the mean of its divisors is an integer number (10467192).

Almost surely, 2^40124213 is an apocalyptic number.

It is an amenable number.

40124213 is a deficient number, since it is larger than the sum of its proper divisors (1744555).

40124213 is a wasteful number, since it uses less digits than its factorization.

40124213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744554.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40124213 is about 6334.3676085305. The cubic root of 40124213 is about 342.3488256061.

Adding to 40124213 its reverse (31242104), we get a palindrome (71366317).

The spelling of 40124213 in words is "forty million, one hundred twenty-four thousand, two hundred thirteen".