42723651 has 4 divisors (see below), whose sum is σ = 56964872. Its totient is φ = 28482432.

The previous prime is 42723643. The next prime is 42723683. The reversal of 42723651 is 15632724.

42723651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42723651 - 2³ = 42723643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42723251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7120606 + ... + 7120611.

It is an arithmetic number, because the mean of its divisors is an integer number (14241218).

Almost surely, 2^42723651 is an apocalyptic number.

42723651 is a deficient number, since it is larger than the sum of its proper divisors (14241221).

42723651 is a wasteful number, since it uses less digits than its factorization.

42723651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14241220.

The product of its digits is 10080, while the sum is 30.

The square root of 42723651 is about 6536.3331463444. Note that the first 3 decimals coincide. The cubic root of 42723651 is about 349.5876804417.

The spelling of 42723651 in words is "forty-two million, seven hundred twenty-three thousand, six hundred fifty-one".