1961297 has 4 divisors (see below), whose sum is σ = 2112180. Its totient is φ = 1810416.

The previous prime is 1961257. The next prime is 1961321. The reversal of 1961297 is 7921691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 229441 + 1731856 = 479^2 + 1316^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961297 - 2¹⁸ = 1699153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75422 + ... + 75447.

It is an arithmetic number, because the mean of its divisors is an integer number (528045).

2^1961297 is an apocalyptic number.

It is an amenable number.

1961297 is a deficient number, since it is larger than the sum of its proper divisors (150883).

1961297 is a wasteful number, since it uses less digits than its factorization.

1961297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150882.

The product of its digits is 6804, while the sum is 35.

The square root of 1961297 is about 1400.4631376798. The cubic root of 1961297 is about 125.1740934193.

It can be divided in two parts, 19 and 61297, that added together give a palindrome (61316).

The spelling of 1961297 in words is "one million, nine hundred sixty-one thousand, two hundred ninety-seven".