420253073 has 4 divisors (see below), whose sum is σ = 444973860. Its totient is φ = 395532288.

The previous prime is 420253069. The next prime is 420253091. The reversal of 420253073 is 370352024.

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 272679169 + 147573904 = 16513^2 + 12148^2 .

It is a cyclic number.

It is not a de Polignac number, because 420253073 - 2² = 420253069 is a prime.

It is a super-2 number, since 2×420253073² = 353225290731886658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420253973) 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, 12360368 + ... + 12360401.

It is an arithmetic number, because the mean of its divisors is an integer number (111243465).

Almost surely, 2^420253073 is an apocalyptic number.

It is an amenable number.

420253073 is a deficient number, since it is larger than the sum of its proper divisors (24720787).

420253073 is a wasteful number, since it uses less digits than its factorization.

420253073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24720786.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 420253073 is about 20500.0749510825. The cubic root of 420253073 is about 749.0376237114.

It can be divided in two parts, 4202 and 53073, that added together give a palindrome (57275).

The spelling of 420253073 in words is "four hundred twenty million, two hundred fifty-three thousand, seventy-three".