1961018 has 16 divisors (see below), whose sum is σ = 3144744. Its totient is φ = 913920.

The previous prime is 1960993. The next prime is 1961021. The reversal of 1961018 is 8101691.

It can be written as a sum of positive squares in 4 ways, for example, as 1408969 + 552049 = 1187^2 + 743^2 .

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 7 ways as a sum of consecutive naturals, for example, 4448 + ... + 4868.

2^1961018 is an apocalyptic number.

1961018 is a deficient number, since it is larger than the sum of its proper divisors (1183726).

1961018 is a wasteful number, since it uses less digits than its factorization.

1961018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1961018 is about 1400.3635242322. The cubic root of 1961018 is about 125.1681576825.

The spelling of 1961018 in words is "one million, nine hundred sixty-one thousand, eighteen".