42724697 has 4 divisors (see below), whose sum is σ = 42752676. Its totient is φ = 42696720.

The previous prime is 42724687. The next prime is 42724699. The reversal of 42724697 is 79642724.

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 24840256 + 17884441 = 4984^2 + 4229^2 .

It is a cyclic number.

It is not a de Polignac number, because 42724697 - 2¹⁴ = 42708313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42724699) 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, 11558 + ... + 14799.

It is an arithmetic number, because the mean of its divisors is an integer number (10688169).

Almost surely, 2^42724697 is an apocalyptic number.

It is an amenable number.

42724697 is a deficient number, since it is larger than the sum of its proper divisors (27979).

42724697 is a wasteful number, since it uses less digits than its factorization.

42724697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27978.

The product of its digits is 169344, while the sum is 41.

The square root of 42724697 is about 6536.4131601361. The cubic root of 42724697 is about 349.5905333948.

The spelling of 42724697 in words is "forty-two million, seven hundred twenty-four thousand, six hundred ninety-seven".