42731461 has 4 divisors (see below), whose sum is σ = 43369312. Its totient is φ = 42093612.

The previous prime is 42731453. The next prime is 42731477. The reversal of 42731461 is 16413724.

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 42731461 - 2³ = 42731453 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 (42731431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318825 + ... + 318958.

It is an arithmetic number, because the mean of its divisors is an integer number (10842328).

Almost surely, 2^42731461 is an apocalyptic number.

It is an amenable number.

42731461 is a deficient number, since it is larger than the sum of its proper divisors (637851).

42731461 is an equidigital number, since it uses as much as digits as its factorization.

42731461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637850.

The product of its digits is 4032, while the sum is 28.

The square root of 42731461 is about 6536.9305488126. The cubic root of 42731461 is about 349.6089810045.

The spelling of 42731461 in words is "forty-two million, seven hundred thirty-one thousand, four hundred sixty-one".