1961500 has 24 divisors (see below), whose sum is σ = 4285008. Its totient is φ = 784400.

The previous prime is 1961489. The next prime is 1961501. The reversal of 1961500 is 51691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961501) 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 7 ways as a sum of consecutive naturals, for example, 1462 + ... + 2461.

It is an arithmetic number, because the mean of its divisors is an integer number (178542).

2^1961500 is an apocalyptic number.

1961500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1961500 is an abundant number, since it is smaller than the sum of its proper divisors (2323508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961500 is a wasteful number, since it uses less digits than its factorization.

1961500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942 (or 3930 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 1961500 is about 1400.5356118286. The cubic root of 1961500 is about 125.1784118991.

The spelling of 1961500 in words is "one million, nine hundred sixty-one thousand, five hundred".