40121353 has 2 divisors, whose sum is σ = 40121354. Its totient is φ = 40121352.

The previous prime is 40121339. The next prime is 40121363. The reversal of 40121353 is 35312104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32569849 + 7551504 = 5707^2 + 2748^2 .

It is a cyclic number.

It is not a de Polignac number, because 40121353 - 2⁵ = 40121321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40121353.

It is not a weakly prime, because it can be changed into another prime (40121303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060676 + 20060677.

It is an arithmetic number, because the mean of its divisors is an integer number (20060677).

Almost surely, 2^40121353 is an apocalyptic number.

It is an amenable number.

40121353 is a deficient number, since it is larger than the sum of its proper divisors (1).

40121353 is an equidigital number, since it uses as much as digits as its factorization.

40121353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 40121353 is about 6334.1418519007. The cubic root of 40121353 is about 342.3406913581.

Adding to 40121353 its reverse (35312104), we get a palindrome (75433457).

Subtracting from 40121353 its reverse (35312104), we obtain a square (4809249 = 2193²).

The spelling of 40121353 in words is "forty million, one hundred twenty-one thousand, three hundred fifty-three".