1620136 has 24 divisors (see below), whose sum is σ = 3534570. Its totient is φ = 694176.

The previous prime is 1620133. The next prime is 1620161. The reversal of 1620136 is 6310261.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 396900 = 1106^2 + 630^2 .

It is not an unprimeable number, because it can be changed into a prime (1620133) 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, 1675 + ... + 2458.

2^1620136 is an apocalyptic number.

It is an amenable number.

1620136 is an abundant number, since it is smaller than the sum of its proper divisors (1914434).

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

1620136 is a wasteful number, since it uses less digits than its factorization.

1620136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4153 (or 4142 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1620136 is about 1272.8456308602. The cubic root of 1620136 is about 117.4493156987.

Adding to 1620136 its reverse (6310261), we get a palindrome (7930397).

The spelling of 1620136 in words is "one million, six hundred twenty thousand, one hundred thirty-six".