284921421 has 8 divisors (see below), whose sum is σ = 380392320. Its totient is φ = 189699072.

The previous prime is 284921393. The next prime is 284921449. The reversal of 284921421 is 124129482.

It is an interprime number because it is at equal distance from previous prime (284921393) and next prime (284921449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 284921421 - 2⁵ = 284921389 is a prime.

It is a super-2 number, since 2×284921421² = 162360432289318482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284921471) 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, 59445 + ... + 64058.

It is an arithmetic number, because the mean of its divisors is an integer number (47549040).

Almost surely, 2^284921421 is an apocalyptic number.

It is an amenable number.

284921421 is a deficient number, since it is larger than the sum of its proper divisors (95470899).

284921421 is a wasteful number, since it uses less digits than its factorization.

284921421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124275.

The product of its digits is 9216, while the sum is 33.

The square root of 284921421 is about 16879.6155465698. The cubic root of 284921421 is about 658.0239495414.

The spelling of 284921421 in words is "two hundred eighty-four million, nine hundred twenty-one thousand, four hundred twenty-one".