1950091 has 12 divisors (see below), whose sum is σ = 2305800. Its totient is φ = 1634880.

The previous prime is 1950089. The next prime is 1950107. The reversal of 1950091 is 1900591.

1950091 = T₄₁₀ + T₄₁₁ + ... + T₄₃₁.

It is not a de Polignac number, because 1950091 - 2¹ = 1950089 is a prime.

It is a Duffinian number.

1950091 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1950061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1335 + ... + 2383.

It is an arithmetic number, because the mean of its divisors is an integer number (192150).

2^1950091 is an apocalyptic number.

1950091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1950091 is a deficient number, since it is larger than the sum of its proper divisors (355709).

1950091 is a wasteful number, since it uses less digits than its factorization.

1950091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 1950091 is about 1396.4565872235. The cubic root of 1950091 is about 124.9352411228.

It can be divided in two parts, 19500 and 91, that added together give a palindrome (19591).

The spelling of 1950091 in words is "one million, nine hundred fifty thousand, ninety-one".