1901216 has 48 divisors (see below), whose sum is σ = 4082400. Its totient is φ = 868608.

The previous prime is 1901209. The next prime is 1901219. The reversal of 1901216 is 6121091.

It is a super-2 number, since 2×1901216² = 7229244557312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32195 + ... + 32253.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2^1901216 is an apocalyptic number.

1901216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1901216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041200).

1901216 is an abundant number, since it is smaller than the sum of its proper divisors (2181184).

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

1901216 is a wasteful number, since it uses less digits than its factorization.

1901216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1901216 is about 1378.8458942173. The cubic root of 1901216 is about 123.8826499912.

The spelling of 1901216 in words is "one million, nine hundred one thousand, two hundred sixteen".