421040149 has 2 divisors, whose sum is σ = 421040150. Its totient is φ = 421040148.

The previous prime is 421040143. The next prime is 421040203. The reversal of 421040149 is 941040124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407313124 + 13727025 = 20182^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 421040149 - 2³ = 421040141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421040141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210520074 + 210520075.

It is an arithmetic number, because the mean of its divisors is an integer number (210520075).

Almost surely, 2^421040149 is an apocalyptic number.

It is an amenable number.

421040149 is a deficient number, since it is larger than the sum of its proper divisors (1).

421040149 is an equidigital number, since it uses as much as digits as its factorization.

421040149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 421040149 is about 20519.2628766240. The cubic root of 421040149 is about 749.5049467831.

Subtracting from 421040149 its sum of digits (25), we obtain a palindrome (421040124).

The spelling of 421040149 in words is "four hundred twenty-one million, forty thousand, one hundred forty-nine".