1521396 has 24 divisors (see below), whose sum is σ = 3944640. Its totient is φ = 507096.

The previous prime is 1521391. The next prime is 1521397. The reversal of 1521396 is 6931251.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521391) 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 7 ways as a sum of consecutive naturals, for example, 6936 + ... + 7151.

It is an arithmetic number, because the mean of its divisors is an integer number (164360).

2^1521396 is an apocalyptic number.

It is an amenable number.

1521396 is an abundant number, since it is smaller than the sum of its proper divisors (2423244).

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

1521396 is a wasteful number, since it uses less digits than its factorization.

1521396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14100 (or 14092 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1521396 is about 1233.4488234215. The cubic root of 1521396 is about 115.0131301958.

The spelling of 1521396 in words is "one million, five hundred twenty-one thousand, three hundred ninety-six".