42051152421 has 12 divisors (see below), whose sum is σ = 62382190572. Its totient is φ = 27276422976.

The previous prime is 42051152399. The next prime is 42051152441. The reversal of 42051152421 is 12425115024.

It is a happy number.

42051152421 is a `hidden beast` number, since 42 + 0 + 51 + 152 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40687327521 + 1363824900 = 201711^2 + 36930^2 .

It is not a de Polignac number, because 42051152421 - 2⁵ = 42051152389 is a prime.

It is a super-2 number, since 2×42051152421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42051152441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63139536 + ... + 63140201.

It is an arithmetic number, because the mean of its divisors is an integer number (5198515881).

Almost surely, 2^42051152421 is an apocalyptic number.

It is an amenable number.

42051152421 is a deficient number, since it is larger than the sum of its proper divisors (20331038151).

42051152421 is a wasteful number, since it uses less digits than its factorization.

42051152421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126279780 (or 126279777 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 42051152421 its reverse (12425115024), we get a palindrome (54476267445).

The spelling of 42051152421 in words is "forty-two billion, fifty-one million, one hundred fifty-two thousand, four hundred twenty-one".