42012423451 has 2 divisors, whose sum is σ = 42012423452. Its totient is φ = 42012423450.

The previous prime is 42012423443. The next prime is 42012423463. The reversal of 42012423451 is 15432421024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42012423451 - 2³ = 42012423443 is a prime.

It is a super-2 number, since 2×42012423451² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42012423751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006211725 + 21006211726.

It is an arithmetic number, because the mean of its divisors is an integer number (21006211726).

Almost surely, 2^42012423451 is an apocalyptic number.

42012423451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42012423451 is an equidigital number, since it uses as much as digits as its factorization.

42012423451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 42012423451 its reverse (15432421024), we get a palindrome (57444844475).

The spelling of 42012423451 in words is "forty-two billion, twelve million, four hundred twenty-three thousand, four hundred fifty-one".