421002455 has 8 divisors (see below), whose sum is σ = 511598400. Its totient is φ = 332538336.

The previous prime is 421002443. The next prime is 421002481. The reversal of 421002455 is 554200124.

It is a happy number.

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 421002455 - 2¹² = 420998359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421002455.

It is a congruent number.

It is an unprimeable number.

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, 532520 + ... + 533309.

It is an arithmetic number, because the mean of its divisors is an integer number (63949800).

Almost surely, 2^421002455 is an apocalyptic number.

421002455 is a deficient number, since it is larger than the sum of its proper divisors (90595945).

421002455 is a wasteful number, since it uses less digits than its factorization.

421002455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065913.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 421002455 is about 20518.3443532854. The cubic root of 421002455 is about 749.4825794130.

Adding to 421002455 its reverse (554200124), we get a palindrome (975202579).

The spelling of 421002455 in words is "four hundred twenty-one million, two thousand, four hundred fifty-five".