40121420 has 12 divisors (see below), whose sum is σ = 84255024. Its totient is φ = 16048560.

The previous prime is 40121399. The next prime is 40121423. The reversal of 40121420 is 2412104.

It is a junction number, because it is equal to n+sod(n) for n = 40121395 and 40121404.

It is not an unprimeable number, because it can be changed into a prime (40121423) 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, 1003016 + ... + 1003055.

It is an arithmetic number, because the mean of its divisors is an integer number (7021252).

Almost surely, 2^40121420 is an apocalyptic number.

It is an amenable number.

40121420 is an abundant number, since it is smaller than the sum of its proper divisors (44133604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40121420 is a wasteful number, since it uses less digits than its factorization.

40121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006080 (or 2006078 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 40121420 is about 6334.1471406970. The cubic root of 40121420 is about 342.3408819201.

Adding to 40121420 its reverse (2412104), we get a palindrome (42533524).

The spelling of 40121420 in words is "forty million, one hundred twenty-one thousand, four hundred twenty".