40135042 has 4 divisors (see below), whose sum is σ = 60202566. Its totient is φ = 20067520.

The previous prime is 40135037. The next prime is 40135063. The reversal of 40135042 is 24053104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37442161 + 2692881 = 6119^2 + 1641^2 .

It is a super-2 number, since 2×40135042² = 3221643192683528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033759 + ... + 10033762.

Almost surely, 2^40135042 is an apocalyptic number.

40135042 is a deficient number, since it is larger than the sum of its proper divisors (20067524).

40135042 is a wasteful number, since it uses less digits than its factorization.

40135042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20067523.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40135042 is about 6335.2223323258. Note that the first 3 decimals coincide. The cubic root of 40135042 is about 342.3796213251.

Adding to 40135042 its reverse (24053104), we get a palindrome (64188146).

The spelling of 40135042 in words is "forty million, one hundred thirty-five thousand, forty-two".