901020 has 24 divisors (see below), whose sum is σ = 2523024. Its totient is φ = 240256.

The previous prime is 901013. The next prime is 901063. The reversal of 901020 is 20109.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 900987 and 901005.

It is a congruent number.

It is an unprimeable number.

901020 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7449 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (105126).

2⁹⁰¹⁰²⁰ is an apocalyptic number.

It is an amenable number.

901020 is an abundant number, since it is smaller than the sum of its proper divisors (1622004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

901020 is a wasteful number, since it uses less digits than its factorization.

901020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15029 (or 15027 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 901020 is about 949.2207330226. The cubic root of 901020 is about 96.5853987336.

Adding to 901020 its reverse (20109), we get a palindrome (921129).

The spelling of 901020 in words is "nine hundred one thousand, twenty".