420975073 has 4 divisors (see below), whose sum is σ = 425705220. Its totient is φ = 416244928.

The previous prime is 420975043. The next prime is 420975083. The reversal of 420975073 is 370579024.

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 25482304 + 395492769 = 5048^2 + 19887^2 .

It is a cyclic number.

It is not a de Polignac number, because 420975073 - 2⁵ = 420975041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420975043) 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, 2364940 + ... + 2365117.

It is an arithmetic number, because the mean of its divisors is an integer number (106426305).

Almost surely, 2^420975073 is an apocalyptic number.

It is an amenable number.

420975073 is a deficient number, since it is larger than the sum of its proper divisors (4730147).

420975073 is an equidigital number, since it uses as much as digits as its factorization.

420975073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730146.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 420975073 is about 20517.6770858692. The cubic root of 420975073 is about 749.4663302782.

The spelling of 420975073 in words is "four hundred twenty million, nine hundred seventy-five thousand, seventy-three".