40001042 has 16 divisors (see below), whose sum is σ = 64506240. Its totient is φ = 18543888.

The previous prime is 40001041. The next prime is 40001057. The reversal of 40001042 is 24010004.

It is a super-2 number, since 2×40001042² = 3200166722171528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40001041) 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 7 ways as a sum of consecutive naturals, for example, 9413 + ... + 12984.

It is an arithmetic number, because the mean of its divisors is an integer number (4031640).

Almost surely, 2^40001042 is an apocalyptic number.

40001042 is a deficient number, since it is larger than the sum of its proper divisors (24505198).

40001042 is a wasteful number, since it uses less digits than its factorization.

40001042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22465.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40001042 is about 6324.6376971333. The cubic root of 40001042 is about 341.9981589678.

Adding to 40001042 its reverse (24010004), we get a palindrome (64011046).

The spelling of 40001042 in words is "forty million, one thousand, forty-two".