42120044 has 12 divisors (see below), whose sum is σ = 73815000. Its totient is φ = 21030048.

The previous prime is 42120007. The next prime is 42120049. The reversal of 42120044 is 44002124.

It is not an unprimeable number, because it can be changed into a prime (42120049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4169 + ... + 10080.

It is an arithmetic number, because the mean of its divisors is an integer number (6151250).

Almost surely, 2^42120044 is an apocalyptic number.

It is an amenable number.

42120044 is a deficient number, since it is larger than the sum of its proper divisors (31694956).

42120044 is a wasteful number, since it uses less digits than its factorization.

42120044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14992 (or 14990 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42120044 is about 6489.9956856688. The cubic root of 42120044 is about 347.9335210133.

Adding to 42120044 its reverse (44002124), we get a palindrome (86122168).

The spelling of 42120044 in words is "forty-two million, one hundred twenty thousand, forty-four".