1961590 has 8 divisors (see below), whose sum is σ = 3530880. Its totient is φ = 784632.

The previous prime is 1961581. The next prime is 1961593. The reversal of 1961590 is 951691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98070 + ... + 98089.

It is an arithmetic number, because the mean of its divisors is an integer number (441360).

2^1961590 is an apocalyptic number.

1961590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1961590 is a deficient number, since it is larger than the sum of its proper divisors (1569290).

1961590 is a wasteful number, since it uses less digits than its factorization.

1961590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196166.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 1961590 is about 1400.5677420246. The cubic root of 1961590 is about 125.1803264007.

The spelling of 1961590 in words is "one million, nine hundred sixty-one thousand, five hundred ninety".