40773121 has 2 divisors, whose sum is σ = 40773122. Its totient is φ = 40773120.

The previous prime is 40773119. The next prime is 40773127. The reversal of 40773121 is 12137704.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 132496 = 6375^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 40773121 - 2¹ = 40773119 is a prime.

Together with 40773119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40773127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20386560 + 20386561.

It is an arithmetic number, because the mean of its divisors is an integer number (20386561).

Almost surely, 2^40773121 is an apocalyptic number.

It is an amenable number.

40773121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40773121 is an equidigital number, since it uses as much as digits as its factorization.

40773121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 40773121 is about 6385.3833870802. The cubic root of 40773121 is about 344.1845081268.

The spelling of 40773121 in words is "forty million, seven hundred seventy-three thousand, one hundred twenty-one".