1961219 has 8 divisors (see below), whose sum is σ = 2148720. Its totient is φ = 1778976.

The previous prime is 1961213. The next prime is 1961221. The reversal of 1961219 is 9121691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961219 is a prime.

It is a super-2 number, since 2×1961219² = 7692759931922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1961191 and 1961200.

It is not an unprimeable number, because it can be changed into a prime (1961213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512 + ... + 2045.

It is an arithmetic number, because the mean of its divisors is an integer number (268590).

2^1961219 is an apocalyptic number.

1961219 is a deficient number, since it is larger than the sum of its proper divisors (187501).

1961219 is a wasteful number, since it uses less digits than its factorization.

1961219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629.

The product of its digits is 972, while the sum is 29.

The square root of 1961219 is about 1400.4352894725. The cubic root of 1961219 is about 125.1724340227.

Subtracting from 1961219 its sum of digits (29), we obtain a triangular number (1961190 = T₁₉₈₀).

The spelling of 1961219 in words is "one million, nine hundred sixty-one thousand, two hundred nineteen".