42361351421 has 4 divisors (see below), whose sum is σ = 42780770844. Its totient is φ = 41941932000.

The previous prime is 42361351399. The next prime is 42361351427. The reversal of 42361351421 is 12415316324.

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 21000067396 + 21361284025 = 144914^2 + 146155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42361351421 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 (42361351427) 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, 209709560 + ... + 209709761.

It is an arithmetic number, because the mean of its divisors is an integer number (10695192711).

Almost surely, 2^42361351421 is an apocalyptic number.

It is an amenable number.

42361351421 is a deficient number, since it is larger than the sum of its proper divisors (419419423).

42361351421 is a wasteful number, since it uses less digits than its factorization.

42361351421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419419422.

The product of its digits is 17280, while the sum is 32.

Adding to 42361351421 its reverse (12415316324), we get a palindrome (54776667745).

The spelling of 42361351421 in words is "forty-two billion, three hundred sixty-one million, three hundred fifty-one thousand, four hundred twenty-one".