405487400421 has 8 divisors (see below), whose sum is σ = 541940202720. Its totient is φ = 269679765872.

The previous prime is 405487400399. The next prime is 405487400429. The reversal of 405487400421 is 124004784504.

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 405487400421 - 2⁷ = 405487400293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405487400421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405487400429) 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, 161290470 + ... + 161292983.

It is an arithmetic number, because the mean of its divisors is an integer number (67742525340).

Almost surely, 2^405487400421 is an apocalyptic number.

It is an amenable number.

405487400421 is a deficient number, since it is larger than the sum of its proper divisors (136452802299).

405487400421 is a wasteful number, since it uses less digits than its factorization.

405487400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322583875.

The product of its (nonzero) digits is 143360, while the sum is 39.

The spelling of 405487400421 in words is "four hundred five billion, four hundred eighty-seven million, four hundred thousand, four hundred twenty-one".