40242012421 has 8 divisors (see below), whose sum is σ = 43339154040. Its totient is φ = 37145099712.

The previous prime is 40242012401. The next prime is 40242012439. The reversal of 40242012421 is 12421024204.

It can be written as a sum of positive squares in 4 ways, for example, as 784560100 + 39457452321 = 28010^2 + 198639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40242012421 - 2⁵ = 40242012389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40242012392 and 40242012401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40242012401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534795 + ... + 605383.

It is an arithmetic number, because the mean of its divisors is an integer number (5417394255).

Almost surely, 2^40242012421 is an apocalyptic number.

It is an amenable number.

40242012421 is a deficient number, since it is larger than the sum of its proper divisors (3097141619).

40242012421 is a wasteful number, since it uses less digits than its factorization.

40242012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114455.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 40242012421 its reverse (12421024204), we get a palindrome (52663036625).

The spelling of 40242012421 in words is "forty billion, two hundred forty-two million, twelve thousand, four hundred twenty-one".