901121 has 4 divisors (see below), whose sum is σ = 970452. Its totient is φ = 831792.

The previous prime is 901111. The next prime is 901133. The reversal of 901121 is 121109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121109 = 163 ⋅743.

It can be written as a sum of positive squares in 2 ways, for example, as 261121 + 640000 = 511^2 + 800^2 .

It is not a de Polignac number, because 901121 - 2¹⁸ = 638977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 901096 and 901105.

It is not an unprimeable number, because it can be changed into a prime (901111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34646 + ... + 34671.

It is an arithmetic number, because the mean of its divisors is an integer number (242613).

It is a Proth number, since it is equal to 55 ⋅ 2¹⁴ + 1 and 55 < 2¹⁴.

2⁹⁰¹¹²¹ is an apocalyptic number.

It is an amenable number.

901121 is a deficient number, since it is larger than the sum of its proper divisors (69331).

901121 is a wasteful number, since it uses less digits than its factorization.

901121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69330.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 901121 is about 949.2739330667. The cubic root of 901121 is about 96.5890075180.

The spelling of 901121 in words is "nine hundred one thousand, one hundred twenty-one".