40002542 has 8 divisors (see below), whose sum is σ = 62073000. Its totient is φ = 19311544.

The previous prime is 40002491. The next prime is 40002559. The reversal of 40002542 is 24520004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40002542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344792 + ... + 344907.

It is an arithmetic number, because the mean of its divisors is an integer number (7759125).

Almost surely, 2^40002542 is an apocalyptic number.

40002542 is a deficient number, since it is larger than the sum of its proper divisors (22070458).

40002542 is a wasteful number, since it uses less digits than its factorization.

40002542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689730.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 40002542 is about 6324.7562798894. The cubic root of 40002542 is about 342.0024337800.

Adding to 40002542 its reverse (24520004), we get a palindrome (64522546).

The spelling of 40002542 in words is "forty million, two thousand, five hundred forty-two".