1521612 has 48 divisors (see below), whose sum is σ = 4019680. Its totient is φ = 497664.

The previous prime is 1521599. The next prime is 1521613. The reversal of 1521612 is 2161251.

1521612 is a `hidden beast` number, since 1 + 52 + 1 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1521613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7788 + ... + 7980.

2^1521612 is an apocalyptic number.

1521612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1521612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2009840).

1521612 is an abundant number, since it is smaller than the sum of its proper divisors (2498068).

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

1521612 is a wasteful number, since it uses less digits than its factorization.

1521612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 271 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1521612 is about 1233.5363796824. The cubic root of 1521612 is about 115.0185729297.

Adding to 1521612 its reverse (2161251), we get a palindrome (3682863).

It can be divided in two parts, 152 and 1612, that added together give a square (1764 = 42²).

The spelling of 1521612 in words is "one million, five hundred twenty-one thousand, six hundred twelve".