421355786247 has 48 divisors (see below), whose sum is σ = 710756766720. Its totient is φ = 247129444800.

The previous prime is 421355786237. The next prime is 421355786249. The reversal of 421355786247 is 742687553124.

421355786247 is a `hidden beast` number, since 4 + 2 + 1 + 3 + 5 + 5 + 7 + 8 + 624 + 7 = 666.

It is not a de Polignac number, because 421355786247 - 2¹⁸ = 421355524103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421355786193 and 421355786202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421355786249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2459622 + ... + 2625347.

It is an arithmetic number, because the mean of its divisors is an integer number (14807432640).

Almost surely, 2^421355786247 is an apocalyptic number.

421355786247 is a deficient number, since it is larger than the sum of its proper divisors (289400980473).

421355786247 is a wasteful number, since it uses less digits than its factorization.

421355786247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085026 (or 5085014 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

The spelling of 421355786247 in words is "four hundred twenty-one billion, three hundred fifty-five million, seven hundred eighty-six thousand, two hundred forty-seven".