42742044 has 18 divisors (see below), whose sum is σ = 108042480. Its totient is φ = 14247336.

The previous prime is 42742031. The next prime is 42742069. The reversal of 42742044 is 44024724.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 42741999 and 42742017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593604 + ... + 593675.

It is an arithmetic number, because the mean of its divisors is an integer number (6002360).

Almost surely, 2^42742044 is an apocalyptic number.

It is an amenable number.

42742044 is an abundant number, since it is smaller than the sum of its proper divisors (65300436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42742044 is a wasteful number, since it uses less digits than its factorization.

42742044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187289 (or 1187284 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 27.

The square root of 42742044 is about 6537.7399764751. The cubic root of 42742044 is about 349.6378403535.

Adding to 42742044 its reverse (44024724), we get a palindrome (86766768).

The spelling of 42742044 in words is "forty-two million, seven hundred forty-two thousand, forty-four".