1531966 has 4 divisors (see below), whose sum is σ = 2297952. Its totient is φ = 765982.

The previous prime is 1531909. The next prime is 1531987. The reversal of 1531966 is 6691351.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382990 + ... + 382993.

It is an arithmetic number, because the mean of its divisors is an integer number (574488).

2^1531966 is an apocalyptic number.

1531966 is a deficient number, since it is larger than the sum of its proper divisors (765986).

1531966 is an equidigital number, since it uses as much as digits as its factorization.

1531966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765985.

The product of its digits is 4860, while the sum is 31.

The square root of 1531966 is about 1237.7261409536. The cubic root of 1531966 is about 115.2788695219.

The spelling of 1531966 in words is "one million, five hundred thirty-one thousand, nine hundred sixty-six".