1961187 has 16 divisors (see below), whose sum is σ = 2796288. Its totient is φ = 1219680.

The previous prime is 1961173. The next prime is 1961213. The reversal of 1961187 is 7811691.

It is not a de Polignac number, because 1961187 - 2⁷ = 1961059 is a prime.

It is an Ulam 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 15 ways as a sum of consecutive naturals, for example, 2637 + ... + 3297.

It is an arithmetic number, because the mean of its divisors is an integer number (174768).

2^1961187 is an apocalyptic number.

1961187 is a deficient number, since it is larger than the sum of its proper divisors (835101).

1961187 is a wasteful number, since it uses less digits than its factorization.

1961187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730.

The product of its digits is 3024, while the sum is 33.

The square root of 1961187 is about 1400.4238644068. The cubic root of 1961187 is about 125.1717532319.

The spelling of 1961187 in words is "one million, nine hundred sixty-one thousand, one hundred eighty-seven".