42939401 has 4 divisors (see below), whose sum is σ = 44420100. Its totient is φ = 41458704.

The previous prime is 42939389. The next prime is 42939409. The reversal of 42939401 is 10493924.

It is a happy number.

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 15366400 + 27573001 = 3920^2 + 5251^2 .

It is a cyclic number.

It is not a de Polignac number, because 42939401 - 2¹⁰ = 42938377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42939409) 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, 740306 + ... + 740363.

It is an arithmetic number, because the mean of its divisors is an integer number (11105025).

Almost surely, 2^42939401 is an apocalyptic number.

It is an amenable number.

42939401 is a deficient number, since it is larger than the sum of its proper divisors (1480699).

42939401 is a wasteful number, since it uses less digits than its factorization.

42939401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480698.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 42939401 is about 6552.8162647826. The cubic root of 42939401 is about 350.1751531485.

The spelling of 42939401 in words is "forty-two million, nine hundred thirty-nine thousand, four hundred one".