42132250421 has 4 divisors (see below), whose sum is σ = 42133712844. Its totient is φ = 42130788000.

The previous prime is 42132250361. The next prime is 42132250423. The reversal of 42132250421 is 12405223124.

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 1966479025 + 40165771396 = 44345^2 + 200414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42132250421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42132250423) 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, 687110 + ... + 745911.

It is an arithmetic number, because the mean of its divisors is an integer number (10533428211).

Almost surely, 2^42132250421 is an apocalyptic number.

It is an amenable number.

42132250421 is a deficient number, since it is larger than the sum of its proper divisors (1462423).

42132250421 is a wasteful number, since it uses less digits than its factorization.

42132250421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462422.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 42132250421 its reverse (12405223124), we get a palindrome (54537473545).

The spelling of 42132250421 in words is "forty-two billion, one hundred thirty-two million, two hundred fifty thousand, four hundred twenty-one".