901445 has 4 divisors (see below), whose sum is σ = 1081740. Its totient is φ = 721152.

The previous prime is 901441. The next prime is 901447. The reversal of 901445 is 544109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 568516 + 332929 = 754^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 901445 - 2² = 901441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 901445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901441) 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, 90140 + ... + 90149.

It is an arithmetic number, because the mean of its divisors is an integer number (270435).

2⁹⁰¹⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

901445 is a deficient number, since it is larger than the sum of its proper divisors (180295).

901445 is a wasteful number, since it uses less digits than its factorization.

901445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180294.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 901445 is about 949.4445744750. Note that the first 3 decimals coincide. The cubic root of 901445 is about 96.6005823929.

The spelling of 901445 in words is "nine hundred one thousand, four hundred forty-five".