1625216 has 16 divisors (see below), whose sum is σ = 3237990. Its totient is φ = 812544.

The previous prime is 1625209. The next prime is 1625227. The reversal of 1625216 is 6125261.

It can be written as a sum of positive squares in only one way, i.e., 1537600 + 87616 = 1240^2 + 296^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 1625191 and 1625200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221 + ... + 6476.

2^1625216 is an apocalyptic number.

1625216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1625216 is a deficient number, since it is larger than the sum of its proper divisors (1612774).

1625216 is an equidigital number, since it uses as much as digits as its factorization.

1625216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12711 (or 12699 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 1625216 is about 1274.8395977534. The cubic root of 1625216 is about 117.5719432659.

The spelling of 1625216 in words is "one million, six hundred twenty-five thousand, two hundred sixteen".