40142449 has 2 divisors, whose sum is σ = 40142450. Its totient is φ = 40142448.

The previous prime is 40142419. The next prime is 40142483. The reversal of 40142449 is 94424104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34105600 + 6036849 = 5840^2 + 2457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40142449 is a prime.

It is a super-2 number, since 2×40142449² = 3222832423435202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40142419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071224 + 20071225.

It is an arithmetic number, because the mean of its divisors is an integer number (20071225).

Almost surely, 2^40142449 is an apocalyptic number.

It is an amenable number.

40142449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40142449 is an equidigital number, since it uses as much as digits as its factorization.

40142449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 40142449 is about 6335.8068941533. The cubic root of 40142449 is about 342.4006823044.

The spelling of 40142449 in words is "forty million, one hundred forty-two thousand, four hundred forty-nine".