1901406 has 32 divisors (see below), whose sum is σ = 4314240. Its totient is φ = 553824.

The previous prime is 1901377. The next prime is 1901407. The reversal of 1901406 is 6041091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 841 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (134820).

2^1901406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1901406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157120).

1901406 is an abundant number, since it is smaller than the sum of its proper divisors (2412834).

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

1901406 is a wasteful number, since it uses less digits than its factorization.

1901406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1901406 is about 1378.9147906959. The cubic root of 1901406 is about 123.8867766343.

Adding to 1901406 its reverse (6041091), we get a palindrome (7942497).

It can be divided in two parts, 190 and 1406, that added together give a triangular number (1596 = T₅₆).

The spelling of 1901406 in words is "one million, nine hundred one thousand, four hundred six".