40126749 has 32 divisors (see below), whose sum is σ = 63141120. Its totient is φ = 22428672.

The previous prime is 40126747. The next prime is 40126753. The reversal of 40126749 is 94762104.

It is a happy number.

It is not a de Polignac number, because 40126749 - 2¹ = 40126747 is a prime.

It is a super-2 number, since 2×40126749² = 3220311970618002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40126747) 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 in 31 ways as a sum of consecutive naturals, for example, 18184 + ... + 20270.

It is an arithmetic number, because the mean of its divisors is an integer number (1973160).

Almost surely, 2^40126749 is an apocalyptic number.

It is an amenable number.

40126749 is a deficient number, since it is larger than the sum of its proper divisors (23014371).

40126749 is a wasteful number, since it uses less digits than its factorization.

40126749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 40126749 is about 6334.5677832035. The cubic root of 40126749 is about 342.3560380287.

The spelling of 40126749 in words is "forty million, one hundred twenty-six thousand, seven hundred forty-nine".