40042273 has 2 divisors, whose sum is σ = 40042274. Its totient is φ = 40042272.

The previous prime is 40042231. The next prime is 40042307. The reversal of 40042273 is 37224004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30107169 + 9935104 = 5487^2 + 3152^2 .

It is a cyclic number.

It is not a de Polignac number, because 40042273 - 2⁹ = 40041761 is a prime.

It is not a weakly prime, because it can be changed into another prime (40042213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021136 + 20021137.

It is an arithmetic number, because the mean of its divisors is an integer number (20021137).

Almost surely, 2^40042273 is an apocalyptic number.

It is an amenable number.

40042273 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042273 is an equidigital number, since it uses as much as digits as its factorization.

40042273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 40042273 is about 6327.8964119208. The cubic root of 40042273 is about 342.1156232748.

Adding to 40042273 its reverse (37224004), we get a palindrome (77266277).

The spelling of 40042273 in words is "forty million, forty-two thousand, two hundred seventy-three".