420451326612442 has 4 divisors (see below), whose sum is σ = 630676989918666. Its totient is φ = 210225663306220.

The previous prime is 420451326612419. The next prime is 420451326612487. The reversal of 420451326612442 is 244216623154024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 215100678348721 + 205350648263721 = 14666311^2 + 14330061^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420451326612392 and 420451326612401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105112831653109 + ... + 105112831653112.

Almost surely, 2^{420451326612442} is an apocalyptic number.

420451326612442 is a deficient number, since it is larger than the sum of its proper divisors (210225663306224).

420451326612442 is a wasteful number, since it uses less digits than its factorization.

420451326612442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210225663306223.

The product of its (nonzero) digits is 2211840, while the sum is 46.

Adding to 420451326612442 its reverse (244216623154024), we get a palindrome (664667949766466).

The spelling of 420451326612442 in words is "four hundred twenty trillion, four hundred fifty-one billion, three hundred twenty-six million, six hundred twelve thousand, four hundred forty-two".