1610261 has 4 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 1607724.

The previous prime is 1610251. The next prime is 1610293. The reversal of 1610261 is 1620161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1610261 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 (1610251) 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, 620 + ... + 1898.

It is an arithmetic number, because the mean of its divisors is an integer number (403200).

2^1610261 is an apocalyptic number.

It is an amenable number.

1610261 is a deficient number, since it is larger than the sum of its proper divisors (2539).

1610261 is a wasteful number, since it uses less digits than its factorization.

1610261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1610261 is about 1268.9605982851. The cubic root of 1610261 is about 117.2102048214.

The spelling of 1610261 in words is "one million, six hundred ten thousand, two hundred sixty-one".