42001653 has 4 divisors (see below), whose sum is σ = 56002208. Its totient is φ = 28001100.

The previous prime is 42001651. The next prime is 42001667. The reversal of 42001653 is 35610024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42001653 - 2¹ = 42001651 is a prime.

It is a Duffinian 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 in 3 ways as a sum of consecutive naturals, for example, 7000273 + ... + 7000278.

It is an arithmetic number, because the mean of its divisors is an integer number (14000552).

Almost surely, 2^42001653 is an apocalyptic number.

It is an amenable number.

42001653 is a deficient number, since it is larger than the sum of its proper divisors (14000555).

42001653 is a wasteful number, since it uses less digits than its factorization.

42001653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14000554.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 42001653 is about 6480.8682288718. The cubic root of 42001653 is about 347.6072246447.

Adding to 42001653 its reverse (35610024), we get a palindrome (77611677).

The spelling of 42001653 in words is "forty-two million, one thousand, six hundred fifty-three".