1621134 has 20 divisors (see below), whose sum is σ = 3632904. Its totient is φ = 540324.

The previous prime is 1621133. The next prime is 1621141. The reversal of 1621134 is 4311261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621133) 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 9 ways as a sum of consecutive naturals, for example, 4842 + ... + 5165.

2^1621134 is an apocalyptic number.

1621134 is an abundant number, since it is smaller than the sum of its proper divisors (2011770).

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

1621134 is a wasteful number, since it uses less digits than its factorization.

1621134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021 (or 10012 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1621134 is about 1273.2376054767. The cubic root of 1621134 is about 117.4734269168.

Adding to 1621134 its reverse (4311261), we get a palindrome (5932395).

It can be divided in two parts, 162 and 1134, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1621134 in words is "one million, six hundred twenty-one thousand, one hundred thirty-four".