421306019 has 16 divisors (see below), whose sum is σ = 489991680. Its totient is φ = 359314560.

The previous prime is 421306001. The next prime is 421306031. The reversal of 421306019 is 910603124.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421306019 is a prime.

It is a super-2 number, since 2×421306019² = 354997523291256722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421306619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20927 + ... + 35784.

It is an arithmetic number, because the mean of its divisors is an integer number (30624480).

Almost surely, 2^421306019 is an apocalyptic number.

421306019 is a deficient number, since it is larger than the sum of its proper divisors (68685661).

421306019 is a wasteful number, since it uses less digits than its factorization.

421306019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56770.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 421306019 is about 20525.7404007748. The cubic root of 421306019 is about 749.6626743787.

The spelling of 421306019 in words is "four hundred twenty-one million, three hundred six thousand, nineteen".