1951161 has 4 divisors (see below), whose sum is σ = 2601552. Its totient is φ = 1300772.

The previous prime is 1951153. The next prime is 1951177. The reversal of 1951161 is 1611591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1611591 = 3 ⋅537197.

It is a cyclic number.

It is not a de Polignac number, because 1951161 - 2³ = 1951153 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1951561) 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, 325191 + ... + 325196.

It is an arithmetic number, because the mean of its divisors is an integer number (650388).

2^1951161 is an apocalyptic number.

It is an amenable number.

1951161 is a deficient number, since it is larger than the sum of its proper divisors (650391).

1951161 is an equidigital number, since it uses as much as digits as its factorization.

1951161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650390.

The product of its digits is 270, while the sum is 24.

The square root of 1951161 is about 1396.8396472036. The cubic root of 1951161 is about 124.9580872815.

It can be divided in two parts, 1951 and 161, that added together give a palindrome (2112).

The spelling of 1951161 in words is "one million, nine hundred fifty-one thousand, one hundred sixty-one".