421401041 has 4 divisors (see below), whose sum is σ = 427173732. Its totient is φ = 415628352.

The previous prime is 421401037. The next prime is 421401047. The reversal of 421401041 is 140104124.

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 79299025 + 342102016 = 8905^2 + 18496^2 .

It is a cyclic number.

It is not a de Polignac number, because 421401041 - 2² = 421401037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421401047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2886236 + ... + 2886381.

It is an arithmetic number, because the mean of its divisors is an integer number (106793433).

Almost surely, 2^421401041 is an apocalyptic number.

It is an amenable number.

421401041 is a deficient number, since it is larger than the sum of its proper divisors (5772691).

421401041 is an equidigital number, since it uses as much as digits as its factorization.

421401041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772690.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 421401041 is about 20528.0549736209. The cubic root of 421401041 is about 749.7190301618.

Adding to 421401041 its reverse (140104124), we get a palindrome (561505165).

The spelling of 421401041 in words is "four hundred twenty-one million, four hundred one thousand, forty-one".