2003261 has 4 divisors (see below), whose sum is σ = 2157372. Its totient is φ = 1849152.

The previous prime is 2003257. The next prime is 2003269. The reversal of 2003261 is 1623002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1623002 = 2 ⋅811501.

It can be written as a sum of positive squares in 2 ways, for example, as 96100 + 1907161 = 310^2 + 1381^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003261 - 2² = 2003257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003269) 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, 77036 + ... + 77061.

It is an arithmetic number, because the mean of its divisors is an integer number (539343).

2^2003261 is an apocalyptic number.

It is an amenable number.

2003261 is a deficient number, since it is larger than the sum of its proper divisors (154111).

2003261 is a wasteful number, since it uses less digits than its factorization.

2003261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154110.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2003261 is about 1415.3660303964. The cubic root of 2003261 is about 126.0605445151.

Adding to 2003261 its reverse (1623002), we get a palindrome (3626263).

The spelling of 2003261 in words is "two million, three thousand, two hundred sixty-one".