40253261 has 2 divisors, whose sum is σ = 40253262. Its totient is φ = 40253260.

The previous prime is 40253233. The next prime is 40253273. The reversal of 40253261 is 16235204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34445161 + 5808100 = 5869^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 40253261 - 2¹⁴ = 40236877 is a prime.

It is a super-2 number, since 2×40253261² = 3240650042268242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40253201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20126630 + 20126631.

It is an arithmetic number, because the mean of its divisors is an integer number (20126631).

Almost surely, 2^40253261 is an apocalyptic number.

It is an amenable number.

40253261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40253261 is an equidigital number, since it uses as much as digits as its factorization.

40253261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40253261 is about 6344.5457678229. The cubic root of 40253261 is about 342.7154550377.

Adding to 40253261 its reverse (16235204), we get a palindrome (56488465).

The spelling of 40253261 in words is "forty million, two hundred fifty-three thousand, two hundred sixty-one".