42135973 has 4 divisors (see below), whose sum is σ = 45966528. Its totient is φ = 38305420.

The previous prime is 42135959. The next prime is 42135983. The reversal of 42135973 is 37953124.

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 a cyclic number.

It is not a de Polignac number, because 42135973 - 2⁵ = 42135941 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 (42135983) 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, 1915261 + ... + 1915282.

It is an arithmetic number, because the mean of its divisors is an integer number (11491632).

Almost surely, 2^42135973 is an apocalyptic number.

It is an amenable number.

42135973 is a deficient number, since it is larger than the sum of its proper divisors (3830555).

42135973 is a wasteful number, since it uses less digits than its factorization.

42135973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830554.

The product of its digits is 22680, while the sum is 34.

The square root of 42135973 is about 6491.2227661666. Note that the first 3 decimals coincide. The cubic root of 42135973 is about 347.9773761000.

The spelling of 42135973 in words is "forty-two million, one hundred thirty-five thousand, nine hundred seventy-three".