1531963 has 4 divisors (see below), whose sum is σ = 1537888. Its totient is φ = 1526040.

The previous prime is 1531909. The next prime is 1531987. The reversal of 1531963 is 3691351.

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

It is a cyclic number.

It is not a de Polignac number, because 1531963 - 2¹⁷ = 1400891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1532963) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2556 + ... + 3097.

It is an arithmetic number, because the mean of its divisors is an integer number (384472).

2^1531963 is an apocalyptic number.

1531963 is a deficient number, since it is larger than the sum of its proper divisors (5925).

1531963 is an equidigital number, since it uses as much as digits as its factorization.

1531963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5924.

The product of its digits is 2430, while the sum is 28.

The square root of 1531963 is about 1237.7249290533. The cubic root of 1531963 is about 115.2787942728.

It can be divided in two parts, 153 and 1963, that added together give a square (2116 = 46²).

The spelling of 1531963 in words is "one million, five hundred thirty-one thousand, nine hundred sixty-three".