421040177 has 4 divisors (see below), whose sum is σ = 423866100. Its totient is φ = 418214256.

The previous prime is 421040149. The next prime is 421040203. The reversal of 421040177 is 771040124.

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 50708641 + 370331536 = 7121^2 + 19244^2 .

It is a cyclic number.

It is not a de Polignac number, because 421040177 - 2²² = 416845873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421043177) 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, 1412738 + ... + 1413035.

It is an arithmetic number, because the mean of its divisors is an integer number (105966525).

Almost surely, 2^421040177 is an apocalyptic number.

It is an amenable number.

421040177 is a deficient number, since it is larger than the sum of its proper divisors (2825923).

421040177 is a wasteful number, since it uses less digits than its factorization.

421040177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825922.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 421040177 is about 20519.2635589097. The cubic root of 421040177 is about 749.5049633976.

The spelling of 421040177 in words is "four hundred twenty-one million, forty thousand, one hundred seventy-seven".