1961845 has 16 divisors (see below), whose sum is σ = 2514240. Its totient is φ = 1465344.

The previous prime is 1961833. The next prime is 1961857. The reversal of 1961845 is 5481691.

It is an interprime number because it is at equal distance from previous prime (1961833) and next prime (1961857).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961845 is a prime.

It is a zygodrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1961845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10069 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (157140).

2^1961845 is an apocalyptic number.

It is an amenable number.

1961845 is a deficient number, since it is larger than the sum of its proper divisors (552395).

1961845 is a wasteful number, since it uses less digits than its factorization.

1961845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324.

The product of its digits is 8640, while the sum is 34.

The square root of 1961845 is about 1400.6587735776. The cubic root of 1961845 is about 125.1857505039.

The spelling of 1961845 in words is "one million, nine hundred sixty-one thousand, eight hundred forty-five".