1621316 has 12 divisors (see below), whose sum is σ = 2960832. Its totient is φ = 775368.

The previous prime is 1621309. The next prime is 1621349. The reversal of 1621316 is 6131261.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8720 + ... + 8903.

It is an arithmetic number, because the mean of its divisors is an integer number (246736).

2^1621316 is an apocalyptic number.

It is an amenable number.

1621316 is a deficient number, since it is larger than the sum of its proper divisors (1339516).

1621316 is a wasteful number, since it uses less digits than its factorization.

1621316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17650 (or 17648 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 1621316 is about 1273.3090748126. The cubic root of 1621316 is about 117.4778228856.

Adding to 1621316 its reverse (6131261), we get a palindrome (7752577).

It can be divided in two parts, 16 and 21316, that multiplied together give a square (341056 = 584²).

The spelling of 1621316 in words is "one million, six hundred twenty-one thousand, three hundred sixteen".