1620232 has 8 divisors (see below), whose sum is σ = 3037950. Its totient is φ = 810112.

The previous prime is 1620217. The next prime is 1620233. The reversal of 1620232 is 2320261.

It can be written as a sum of positive squares in only one way, i.e., 1313316 + 306916 = 1146^2 + 554^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1620233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101257 + ... + 101272.

2^1620232 is an apocalyptic number.

It is an amenable number.

1620232 is a deficient number, since it is larger than the sum of its proper divisors (1417718).

1620232 is a wasteful number, since it uses less digits than its factorization.

1620232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202535 (or 202531 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1620232 is about 1272.8833410804. The cubic root of 1620232 is about 117.4516354446.

Adding to 1620232 its reverse (2320261), we get a palindrome (3940493).

The spelling of 1620232 in words is "one million, six hundred twenty thousand, two hundred thirty-two".