420694 has 4 divisors (see below), whose sum is σ = 631044. Its totient is φ = 210346.

The previous prime is 420691. The next prime is 420731. The reversal of 420694 is 496024.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420691) 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 as a sum of consecutive naturals, namely, 105172 + ... + 105175.

It is an arithmetic number, because the mean of its divisors is an integer number (157761).

2⁴²⁰⁶⁹⁴ is an apocalyptic number.

420694 is a deficient number, since it is larger than the sum of its proper divisors (210350).

420694 is a wasteful number, since it uses less digits than its factorization.

420694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210349.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 420694 is about 648.6092814630. The cubic root of 420694 is about 74.9299494074.

The spelling of 420694 in words is "four hundred twenty thousand, six hundred ninety-four".