420874 has 4 divisors (see below), whose sum is σ = 631314. Its totient is φ = 210436.

The previous prime is 420859. The next prime is 420899. The reversal of 420874 is 478024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 294849 + 126025 = 543^2 + 355^2 .

It is an unprimeable number.

420874 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105217 + ... + 105220.

2⁴²⁰⁸⁷⁴ is an apocalyptic number.

420874 is a deficient number, since it is larger than the sum of its proper divisors (210440).

420874 is a wasteful number, since it uses less digits than its factorization.

420874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210439.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 420874 is about 648.7480250452. The cubic root of 420874 is about 74.9406345037.

Adding to 420874 its reverse (478024), we get a palindrome (898898).

The spelling of 420874 in words is "four hundred twenty thousand, eight hundred seventy-four".