42140737 has 4 divisors (see below), whose sum is σ = 42171696. Its totient is φ = 42109780.

The previous prime is 42140729. The next prime is 42140767. The reversal of 42140737 is 73704124.

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 42140737 - 2³ = 42140729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42140767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13339 + ... + 16192.

It is an arithmetic number, because the mean of its divisors is an integer number (10542924).

Almost surely, 2^42140737 is an apocalyptic number.

It is an amenable number.

42140737 is a deficient number, since it is larger than the sum of its proper divisors (30959).

42140737 is a wasteful number, since it uses less digits than its factorization.

42140737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30958.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 42140737 is about 6491.5897128515. The cubic root of 42140737 is about 347.9904900074.

The spelling of 42140737 in words is "forty-two million, one hundred forty thousand, seven hundred thirty-seven".