42001654 has 4 divisors (see below), whose sum is σ = 63002484. Its totient is φ = 21000826.

The previous prime is 42001651. The next prime is 42001667. The reversal of 42001654 is 45610024.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42001651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500412 + ... + 10500415.

It is an arithmetic number, because the mean of its divisors is an integer number (15750621).

Almost surely, 2^42001654 is an apocalyptic number.

42001654 is a deficient number, since it is larger than the sum of its proper divisors (21000830).

42001654 is a wasteful number, since it uses less digits than its factorization.

42001654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21000829.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 42001654 is about 6480.8683060220. The cubic root of 42001654 is about 347.6072274034.

Adding to 42001654 its reverse (45610024), we get a palindrome (87611678).

The spelling of 42001654 in words is "forty-two million, one thousand, six hundred fifty-four".