42120554 has 16 divisors (see below), whose sum is σ = 73744128. Its totient is φ = 17667312.

The previous prime is 42120523. The next prime is 42120563. The reversal of 42120554 is 45502124.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31349 + ... + 32664.

It is an arithmetic number, because the mean of its divisors is an integer number (4609008).

Almost surely, 2^42120554 is an apocalyptic number.

42120554 is a deficient number, since it is larger than the sum of its proper divisors (31623574).

42120554 is a wasteful number, since it uses less digits than its factorization.

42120554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64069.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42120554 is about 6490.0349767933. The cubic root of 42120554 is about 347.9349252962.

Adding to 42120554 its reverse (45502124), we get a palindrome (87622678).

The spelling of 42120554 in words is "forty-two million, one hundred twenty thousand, five hundred fifty-four".