42906565321 has 3 divisors (see below), whose sum is σ = 42906772461. Its totient is φ = 42906358182.

The previous prime is 42906565277. The next prime is 42906565333. The reversal of 42906565321 is 12356560924.

The square root of 42906565321 is 207139.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 42906565321 - 2⁷ = 42906565193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42906565391) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 103570 + ... + 310708.

It is an arithmetic number, because the mean of its divisors is an integer number (14302257487).

Almost surely, 2^42906565321 is an apocalyptic number.

42906565321 is the 207139-th square number.

42906565321 is the 103570-th centered octagonal number.

It is an amenable number.

42906565321 is a deficient number, since it is larger than the sum of its proper divisors (207140).

42906565321 is an frugal number, since it uses more digits than its factorization.

42906565321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414278 (or 207139 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 42906565321 in words is "forty-two billion, nine hundred six million, five hundred sixty-five thousand, three hundred twenty-one".