901655 has 4 divisors (see below), whose sum is σ = 1081992. Its totient is φ = 721320.

The previous prime is 901643. The next prime is 901657. The reversal of 901655 is 556109.

901655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556109 = 31 ⋅17939.

It is not a de Polignac number, because 901655 - 2⁶ = 901591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901657) 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, 90161 + ... + 90170.

It is an arithmetic number, because the mean of its divisors is an integer number (270498).

2⁹⁰¹⁶⁵⁵ is an apocalyptic number.

901655 is a deficient number, since it is larger than the sum of its proper divisors (180337).

901655 is a wasteful number, since it uses less digits than its factorization.

901655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180336.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 901655 is about 949.5551590087. Note that the first 3 decimals coincide. The cubic root of 901655 is about 96.6080831453.

The spelling of 901655 in words is "nine hundred one thousand, six hundred fifty-five".