42711761 has 4 divisors (see below), whose sum is σ = 42761124. Its totient is φ = 42662400.

The previous prime is 42711749. The next prime is 42711787. The reversal of 42711761 is 16711724.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28686736 + 14025025 = 5356^2 + 3745^2 .

It is a cyclic number.

It is not a de Polignac number, because 42711761 - 2¹⁰ = 42710737 is a prime.

It is a super-2 number, since 2×42711761² = 3648589055442242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42711661) 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, 23360 + ... + 25121.

It is an arithmetic number, because the mean of its divisors is an integer number (10690281).

Almost surely, 2^42711761 is an apocalyptic number.

It is an amenable number.

42711761 is a deficient number, since it is larger than the sum of its proper divisors (49363).

42711761 is an equidigital number, since it uses as much as digits as its factorization.

42711761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49362.

The product of its digits is 2352, while the sum is 29.

The square root of 42711761 is about 6535.4235516912. The cubic root of 42711761 is about 349.5552473273. Note that the first 3 decimals are identical.

The spelling of 42711761 in words is "forty-two million, seven hundred eleven thousand, seven hundred sixty-one".