421269137251 has 8 divisors (see below), whose sum is σ = 430253673984. Its totient is φ = 412285490760.

The previous prime is 421269137231. The next prime is 421269137273. The reversal of 421269137251 is 152731962124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421269137251 - 2²¹ = 421267040099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421269137198 and 421269137207.

It is not an unprimeable number, because it can be changed into a prime (421269137231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781756 + ... + 1205686.

It is an arithmetic number, because the mean of its divisors is an integer number (53781709248).

Almost surely, 2^421269137251 is an apocalyptic number.

421269137251 is a deficient number, since it is larger than the sum of its proper divisors (8984536733).

421269137251 is a wasteful number, since it uses less digits than its factorization.

421269137251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445121.

The product of its digits is 181440, while the sum is 43.

The spelling of 421269137251 in words is "four hundred twenty-one billion, two hundred sixty-nine million, one hundred thirty-seven thousand, two hundred fifty-one".