42740271 has 32 divisors (see below), whose sum is σ = 73113600. Its totient is φ = 24170400.

The previous prime is 42740239. The next prime is 42740297. The reversal of 42740271 is 17204724.

It is a happy number.

It is not a de Polignac number, because 42740271 - 2⁵ = 42740239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42740471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17970 + ... + 20208.

It is an arithmetic number, because the mean of its divisors is an integer number (2284800).

Almost surely, 2^42740271 is an apocalyptic number.

42740271 is a deficient number, since it is larger than the sum of its proper divisors (30373329).

42740271 is a wasteful number, since it uses less digits than its factorization.

42740271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356 (or 2350 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 42740271 is about 6537.6043777518. The cubic root of 42740271 is about 349.6330057971.

Adding to 42740271 its reverse (17204724), we get a palindrome (59944995).

The spelling of 42740271 in words is "forty-two million, seven hundred forty thousand, two hundred seventy-one".