900421 has 8 divisors (see below), whose sum is σ = 948600. Its totient is φ = 853440.

The previous prime is 900409. The next prime is 900443. The reversal of 900421 is 124009.

It can be written as a sum of positive squares in 4 ways, for example, as 65025 + 835396 = 255^2 + 914^2 .

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 900421 - 2⁷ = 900293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 900395 and 900404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900461) 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, 1515 + ... + 2023.

It is an arithmetic number, because the mean of its divisors is an integer number (118575).

2⁹⁰⁰⁴²¹ is an apocalyptic number.

It is an amenable number.

900421 is a deficient number, since it is larger than the sum of its proper divisors (48179).

900421 is a wasteful number, since it uses less digits than its factorization.

900421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 900421 is about 948.9051585907. The cubic root of 900421 is about 96.5639905964.

It can be divided in two parts, 9004 and 21, that added together give a square (9025 = 95²).

The spelling of 900421 in words is "nine hundred thousand, four hundred twenty-one".