421746161251 has 2 divisors, whose sum is σ = 421746161252. Its totient is φ = 421746161250.

The previous prime is 421746161219. The next prime is 421746161443. The reversal of 421746161251 is 152161647124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421746161251 - 2⁵ = 421746161219 is a prime.

It is not a weakly prime, because it can be changed into another prime (421746101251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210873080625 + 210873080626.

It is an arithmetic number, because the mean of its divisors is an integer number (210873080626).

Almost surely, 2^421746161251 is an apocalyptic number.

421746161251 is a deficient number, since it is larger than the sum of its proper divisors (1).

421746161251 is an equidigital number, since it uses as much as digits as its factorization.

421746161251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The spelling of 421746161251 in words is "four hundred twenty-one billion, seven hundred forty-six million, one hundred sixty-one thousand, two hundred fifty-one".