40134325421 has 4 divisors (see below), whose sum is σ = 40792265244. Its totient is φ = 39476385600.

The previous prime is 40134325391. The next prime is 40134325447. The reversal of 40134325421 is 12452343104.

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 18814237225 + 21320088196 = 137165^2 + 146014^2 .

It is a cyclic number.

It is not a de Polignac number, because 40134325421 - 2²² = 40130131117 is a prime.

It is a super-2 number, since 2×40134325421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40134321421) 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, 328969820 + ... + 328969941.

It is an arithmetic number, because the mean of its divisors is an integer number (10198066311).

Almost surely, 2^40134325421 is an apocalyptic number.

It is an amenable number.

40134325421 is a deficient number, since it is larger than the sum of its proper divisors (657939823).

40134325421 is an equidigital number, since it uses as much as digits as its factorization.

40134325421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657939822.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 40134325421 its reverse (12452343104), we get a palindrome (52586668525).

The spelling of 40134325421 in words is "forty billion, one hundred thirty-four million, three hundred twenty-five thousand, four hundred twenty-one".