42377729 has 4 divisors (see below), whose sum is σ = 43839060. Its totient is φ = 40916400.

The previous prime is 42377689. The next prime is 42377749. The reversal of 42377729 is 92777324.

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 16418704 + 25959025 = 4052^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 42377729 - 2¹² = 42373633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42377749) 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, 730622 + ... + 730679.

It is an arithmetic number, because the mean of its divisors is an integer number (10959765).

Almost surely, 2^42377729 is an apocalyptic number.

It is an amenable number.

42377729 is a deficient number, since it is larger than the sum of its proper divisors (1461331).

42377729 is a wasteful number, since it uses less digits than its factorization.

42377729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461330.

The product of its digits is 148176, while the sum is 41.

The square root of 42377729 is about 6509.8178929982. The cubic root of 42377729 is about 348.6416164362.

The spelling of 42377729 in words is "forty-two million, three hundred seventy-seven thousand, seven hundred twenty-nine".