2195901 has 6 divisors (see below), whose sum is σ = 3171870. Its totient is φ = 1463928.

The previous prime is 2195899. The next prime is 2195911. The reversal of 2195901 is 1095912.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1887876 + 308025 = 1374^2 + 555^2 .

It is not a de Polignac number, because 2195901 - 2¹ = 2195899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121986 + ... + 122003.

It is an arithmetic number, because the mean of its divisors is an integer number (528645).

2^2195901 is an apocalyptic number.

It is an amenable number.

2195901 is a deficient number, since it is larger than the sum of its proper divisors (975969).

2195901 is a wasteful number, since it uses less digits than its factorization.

2195901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243995 (or 243992 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 2195901 is about 1481.8572805773. The cubic root of 2195901 is about 129.9783198560.

The spelling of 2195901 in words is "two million, one hundred ninety-five thousand, nine hundred one".