1621096 has 8 divisors (see below), whose sum is σ = 3039570. Its totient is φ = 810544.

The previous prime is 1621093. The next prime is 1621097. The reversal of 1621096 is 6901261.

It can be written as a sum of positive squares in only one way, i.e., 1028196 + 592900 = 1014^2 + 770^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1621096.

It is not an unprimeable number, because it can be changed into a prime (1621093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101311 + ... + 101326.

2^1621096 is an apocalyptic number.

It is an amenable number.

1621096 is a deficient number, since it is larger than the sum of its proper divisors (1418474).

1621096 is a wasteful number, since it uses less digits than its factorization.

1621096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202643 (or 202639 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1621096 is about 1273.2226828014. Note that the first 3 decimals coincide. The cubic root of 1621096 is about 117.4725090356.

It can be divided in two parts, 16 and 21096, that added together give a palindrome (21112).

The spelling of 1621096 in words is "one million, six hundred twenty-one thousand, ninety-six".