1951164 has 36 divisors (see below), whose sum is σ = 4999176. Its totient is φ = 641568.

The previous prime is 1951153. The next prime is 1951177. The reversal of 1951164 is 4611591.

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2662 + ... + 3314.

It is an arithmetic number, because the mean of its divisors is an integer number (138866).

2^1951164 is an apocalyptic number.

1951164 is the 747-th nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1951164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499588).

1951164 is an abundant number, since it is smaller than the sum of its proper divisors (3048012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1951164 is a wasteful number, since it uses less digits than its factorization.

1951164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 741 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1951164 is about 1396.8407210559. The cubic root of 1951164 is about 124.9581513244.

The spelling of 1951164 in words is "one million, nine hundred fifty-one thousand, one hundred sixty-four".