1621113 has 16 divisors (see below), whose sum is σ = 2350656. Its totient is φ = 987840.

The previous prime is 1621097. The next prime is 1621127. The reversal of 1621113 is 3111261.

It is not a de Polignac number, because 1621113 - 2⁴ = 1621097 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1621092 and 1621101.

It is not an unprimeable number, because it can be changed into a prime (1621133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7578 + ... + 7788.

It is an arithmetic number, because the mean of its divisors is an integer number (146916).

2^1621113 is an apocalyptic number.

1621113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1621113 is a deficient number, since it is larger than the sum of its proper divisors (729543).

1621113 is a wasteful number, since it uses less digits than its factorization.

1621113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424.

The product of its digits is 36, while the sum is 15.

The square root of 1621113 is about 1273.2293587567. The cubic root of 1621113 is about 117.4729196684.

Adding to 1621113 its reverse (3111261), we get a palindrome (4732374).

It can be divided in two parts, 162 and 1113, that added together give a triangular number (1275 = T₅₀).

The spelling of 1621113 in words is "one million, six hundred twenty-one thousand, one hundred thirteen".