421140134 has 4 divisors (see below), whose sum is σ = 631710204. Its totient is φ = 210570066.

The previous prime is 421140131. The next prime is 421140169. The reversal of 421140134 is 431041124.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421140131) 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 as a sum of consecutive naturals, namely, 105285032 + ... + 105285035.

It is an arithmetic number, because the mean of its divisors is an integer number (157927551).

Almost surely, 2^421140134 is an apocalyptic number.

421140134 is a deficient number, since it is larger than the sum of its proper divisors (210570070).

421140134 is a wasteful number, since it uses less digits than its factorization.

421140134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210570069.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 421140134 is about 20521.6991011953. The cubic root of 421140134 is about 749.5642707542.

Adding to 421140134 its reverse (431041124), we get a palindrome (852181258).

The spelling of 421140134 in words is "four hundred twenty-one million, one hundred forty thousand, one hundred thirty-four".