421394877 has 6 divisors (see below), whose sum is σ = 608681502. Its totient is φ = 280929912.

The previous prime is 421394867. The next prime is 421394881. The reversal of 421394877 is 778493124.

421394877 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in only one way, i.e., 418979961 + 2414916 = 20469^2 + 1554^2 .

It is not a de Polignac number, because 421394877 - 2¹⁰ = 421393853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421394867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23410818 + ... + 23410835.

It is an arithmetic number, because the mean of its divisors is an integer number (101446917).

Almost surely, 2^421394877 is an apocalyptic number.

It is an amenable number.

421394877 is a deficient number, since it is larger than the sum of its proper divisors (187286625).

421394877 is a wasteful number, since it uses less digits than its factorization.

421394877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46821659 (or 46821656 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 421394877 is about 20527.9048370748. The cubic root of 421394877 is about 749.7153746649.

The spelling of 421394877 in words is "four hundred twenty-one million, three hundred ninety-four thousand, eight hundred seventy-seven".