1961117 has 4 divisors (see below), whose sum is σ = 1980636. Its totient is φ = 1941600.

The previous prime is 1961107. The next prime is 1961129. The reversal of 1961117 is 7111691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7111691 = 619 ⋅11489.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 1125721 = 914^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961117 - 2¹⁰ = 1960093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961107) 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, 9608 + ... + 9809.

It is an arithmetic number, because the mean of its divisors is an integer number (495159).

2^1961117 is an apocalyptic number.

It is an amenable number.

1961117 is a deficient number, since it is larger than the sum of its proper divisors (19519).

1961117 is a wasteful number, since it uses less digits than its factorization.

1961117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19518.

The product of its digits is 378, while the sum is 26.

The square root of 1961117 is about 1400.3988717505. The cubic root of 1961117 is about 125.1702639761.

The spelling of 1961117 in words is "one million, nine hundred sixty-one thousand, one hundred seventeen".