1621612 has 18 divisors (see below), whose sum is σ = 2997708. Its totient is φ = 767448.

The previous prime is 1621597. The next prime is 1621619. The reversal of 1621612 is 2161261.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1621612.

It is not an unprimeable number, because it can be changed into a prime (1621619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 883 + ... + 2005.

2^1621612 is an apocalyptic number.

It is an amenable number.

1621612 is a deficient number, since it is larger than the sum of its proper divisors (1376096).

1621612 is a wasteful number, since it uses less digits than its factorization.

1621612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1144 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 1621612 is about 1273.4253020888. The cubic root of 1621612 is about 117.4849716708.

Adding to 1621612 its reverse (2161261), we get a palindrome (3782873).

The spelling of 1621612 in words is "one million, six hundred twenty-one thousand, six hundred twelve".