1961003 has 12 divisors (see below), whose sum is σ = 2242968. Its totient is φ = 1700160.

The previous prime is 1960993. The next prime is 1961021. The reversal of 1961003 is 3001691.

It is not a de Polignac number, because 1961003 - 2¹² = 1956907 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5651 + ... + 5987.

It is an arithmetic number, because the mean of its divisors is an integer number (186914).

2^1961003 is an apocalyptic number.

1961003 is a deficient number, since it is larger than the sum of its proper divisors (281965).

1961003 is a wasteful number, since it uses less digits than its factorization.

1961003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1961003 is about 1400.3581684698. The cubic root of 1961003 is about 125.1678385409.

Adding to 1961003 its reverse (3001691), we get a palindrome (4962694).

The spelling of 1961003 in words is "one million, nine hundred sixty-one thousand, three".