1961199 has 16 divisors (see below), whose sum is σ = 3059200. Its totient is φ = 1238328.

The previous prime is 1961173. The next prime is 1961213. The reversal of 1961199 is 9911691.

It is not a de Polignac number, because 1961199 - 2⁸ = 1960943 is a prime.

It is a Duffinian number.

1961199 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (191200).

2^1961199 is an apocalyptic number.

1961199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1961199 is a deficient number, since it is larger than the sum of its proper divisors (1098001).

1961199 is a wasteful number, since it uses less digits than its factorization.

1961199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851 (or 3845 counting only the distinct ones).

The product of its digits is 4374, while the sum is 36.

The square root of 1961199 is about 1400.4281488174. The cubic root of 1961199 is about 125.1720085293.

The spelling of 1961199 in words is "one million, nine hundred sixty-one thousand, one hundred ninety-nine".