1661952 has 44 divisors (see below), whose sum is σ = 4437896. Its totient is φ = 552960.

The previous prime is 1661939. The next prime is 1661953. The reversal of 1661952 is 2591661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2802 + ... + 3342.

2^1661952 is an apocalyptic number.

1661952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1661952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2218948).

1661952 is an abundant number, since it is smaller than the sum of its proper divisors (2775944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661952 is an equidigital number, since it uses as much as digits as its factorization.

1661952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 546 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 1661952 is about 1289.1671730230. The cubic root of 1661952 is about 118.4512074578.

The spelling of 1661952 in words is "one million, six hundred sixty-one thousand, nine hundred fifty-two".