421520117 has 8 divisors (see below), whose sum is σ = 446803776. Its totient is φ = 396290752.

The previous prime is 421520107. The next prime is 421520137. The reversal of 421520117 is 711025124.

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 421520117 - 2⁴ = 421520101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421520092 and 421520101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421520107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3008 + ... + 29190.

It is an arithmetic number, because the mean of its divisors is an integer number (55850472).

Almost surely, 2^421520117 is an apocalyptic number.

It is an amenable number.

421520117 is a deficient number, since it is larger than the sum of its proper divisors (25283659).

421520117 is a wasteful number, since it uses less digits than its factorization.

421520117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27147.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 421520117 is about 20530.9550922503. The cubic root of 421520117 is about 749.7896399667.

The spelling of 421520117 in words is "four hundred twenty-one million, five hundred twenty thousand, one hundred seventeen".