1961650 has 12 divisors (see below), whose sum is σ = 3648762. Its totient is φ = 784640.

The previous prime is 1961633. The next prime is 1961651. The reversal of 1961650 is 561691.

It can be written as a sum of positive squares in 3 ways, for example, as 877969 + 1083681 = 937^2 + 1041^2 .

It is not an unprimeable number, because it can be changed into a prime (1961651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19567 + ... + 19666.

2^1961650 is an apocalyptic number.

1961650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1961650 is a deficient number, since it is larger than the sum of its proper divisors (1687112).

1961650 is a wasteful number, since it uses less digits than its factorization.

1961650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39245 (or 39240 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1961650 is about 1400.5891617459. The cubic root of 1961650 is about 125.1816027026.

The spelling of 1961650 in words is "one million, nine hundred sixty-one thousand, six hundred fifty".