1961239 has 8 divisors (see below), whose sum is σ = 2373408. Its totient is φ = 1582080.

The previous prime is 1961231. The next prime is 1961249. The reversal of 1961239 is 9321691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1961239 - 2³ = 1961231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8122 + ... + 8359.

It is an arithmetic number, because the mean of its divisors is an integer number (296676).

2^1961239 is an apocalyptic number.

1961239 is a deficient number, since it is larger than the sum of its proper divisors (412169).

1961239 is a wasteful number, since it uses less digits than its factorization.

1961239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16505.

The product of its digits is 2916, while the sum is 31.

The square root of 1961239 is about 1400.4424300913. The cubic root of 1961239 is about 125.1728595132.

The spelling of 1961239 in words is "one million, nine hundred sixty-one thousand, two hundred thirty-nine".