1905961 has 4 divisors (see below), whose sum is σ = 1913472. Its totient is φ = 1898452.

The previous prime is 1905923. The next prime is 1905979. The reversal of 1905961 is 1695091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1905961 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1905161) 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, 3361 + ... + 3886.

It is an arithmetic number, because the mean of its divisors is an integer number (478368).

2^1905961 is an apocalyptic number.

It is an amenable number.

1905961 is a deficient number, since it is larger than the sum of its proper divisors (7511).

1905961 is an equidigital number, since it uses as much as digits as its factorization.

1905961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7510.

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

The square root of 1905961 is about 1380.5654638589. The cubic root of 1905961 is about 123.9856252848.

The spelling of 1905961 in words is "one million, nine hundred five thousand, nine hundred sixty-one".