421355539 has 4 divisors (see below), whose sum is σ = 459660600. Its totient is φ = 383050480.

The previous prime is 421355531. The next prime is 421355549. The reversal of 421355539 is 935553124.

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

It is a cyclic number.

It is not a de Polignac number, because 421355539 - 2³ = 421355531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421355498 and 421355507.

It is not an unprimeable number, because it can be changed into a prime (421355531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19152514 + ... + 19152535.

It is an arithmetic number, because the mean of its divisors is an integer number (114915150).

Almost surely, 2^421355539 is an apocalyptic number.

421355539 is a deficient number, since it is larger than the sum of its proper divisors (38305061).

421355539 is a wasteful number, since it uses less digits than its factorization.

421355539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38305060.

The product of its digits is 81000, while the sum is 37.

The square root of 421355539 is about 20526.9466555550. The cubic root of 421355539 is about 749.6920448280.

It can be divided in two parts, 42135 and 5539, that added together give a palindrome (47674).

The spelling of 421355539 in words is "four hundred twenty-one million, three hundred fifty-five thousand, five hundred thirty-nine".