1961243 has 4 divisors (see below), whose sum is σ = 1981560. Its totient is φ = 1940928.

The previous prime is 1961231. The next prime is 1961249. The reversal of 1961243 is 3421691.

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 1961243 - 2¹² = 1957147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10013 + ... + 10206.

It is an arithmetic number, because the mean of its divisors is an integer number (495390).

2^1961243 is an apocalyptic number.

1961243 is a deficient number, since it is larger than the sum of its proper divisors (20317).

1961243 is an equidigital number, since it uses as much as digits as its factorization.

1961243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20316.

The product of its digits is 1296, while the sum is 26.

The square root of 1961243 is about 1400.4438582107. The cubic root of 1961243 is about 125.1729446109.

The spelling of 1961243 in words is "one million, nine hundred sixty-one thousand, two hundred forty-three".