1961541 has 12 divisors (see below), whose sum is σ = 2982720. Its totient is φ = 1238760.

The previous prime is 1961537. The next prime is 1961549. The reversal of 1961541 is 1451691.

1961541 is a `hidden beast` number, since 1 + 9 + 615 + 41 = 666.

It is not a de Polignac number, because 1961541 - 2² = 1961537 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961549) 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, 5565 + ... + 5906.

It is an arithmetic number, because the mean of its divisors is an integer number (248560).

2^1961541 is an apocalyptic number.

It is an amenable number.

1961541 is a deficient number, since it is larger than the sum of its proper divisors (1021179).

1961541 is a wasteful number, since it uses less digits than its factorization.

1961541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496 (or 11493 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1961541 is about 1400.5502490093. The cubic root of 1961541 is about 125.1792840682.

The spelling of 1961541 in words is "one million, nine hundred sixty-one thousand, five hundred forty-one".