1683261 has 14 divisors (see below), whose sum is σ = 2524830. Its totient is φ = 1121688.

The previous prime is 1683259. The next prime is 1683271. The reversal of 1683261 is 1623861.

It can be written as a sum of positive squares in only one way, i.e., 1610361 + 72900 = 1269^2 + 270^2 .

It is not a de Polignac number, because 1683261 - 2¹ = 1683259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683251) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 426 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (180345).

2^1683261 is an apocalyptic number.

It is an amenable number.

1683261 is a deficient number, since it is larger than the sum of its proper divisors (841569).

1683261 is an frugal number, since it uses more digits than its factorization.

1683261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2312 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1683261 is about 1297.4054878873. The cubic root of 1683261 is about 118.9553065221.

The spelling of 1683261 in words is "one million, six hundred eighty-three thousand, two hundred sixty-one".