1961045 has 4 divisors (see below), whose sum is σ = 2353260. Its totient is φ = 1568832.

The previous prime is 1961039. The next prime is 1961059. The reversal of 1961045 is 5401691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5401691 = 127 ⋅42533.

It can be written as a sum of positive squares in 2 ways, for example, as 790321 + 1170724 = 889^2 + 1082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961045 - 2⁸ = 1960789 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 196100 + ... + 196109.

It is an arithmetic number, because the mean of its divisors is an integer number (588315).

2^1961045 is an apocalyptic number.

It is an amenable number.

1961045 is a deficient number, since it is larger than the sum of its proper divisors (392215).

1961045 is an equidigital number, since it uses as much as digits as its factorization.

1961045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392214.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1961045 is about 1400.3731645529. The cubic root of 1961045 is about 125.1687321333.

The spelling of 1961045 in words is "one million, nine hundred sixty-one thousand, forty-five".