1911954 has 32 divisors (see below), whose sum is σ = 4250880. Its totient is φ = 568400.

The previous prime is 1911937. The next prime is 1911961. The reversal of 1911954 is 4591191.

1911954 = 87² + 88² + ... + 185².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3649 + ... + 4139.

It is an arithmetic number, because the mean of its divisors is an integer number (132840).

2^1911954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1911954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2125440).

1911954 is an abundant number, since it is smaller than the sum of its proper divisors (2338926).

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

1911954 is a wasteful number, since it uses less digits than its factorization.

1911954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566.

The product of its digits is 1620, while the sum is 30.

The square root of 1911954 is about 1382.7342477859. The cubic root of 1911954 is about 124.1154405350.

It can be divided in two parts, 191 and 1954, that added together give a triangular number (2145 = T₆₅).

The spelling of 1911954 in words is "one million, nine hundred eleven thousand, nine hundred fifty-four".