1521432 has 96 divisors (see below), whose sum is σ = 4801680. Its totient is φ = 430080.

The previous prime is 1521397. The next prime is 1521479. The reversal of 1521432 is 2341251.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13408 + ... + 13520.

2^1521432 is an apocalyptic number.

1521432 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 1521432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2400840).

1521432 is an abundant number, since it is smaller than the sum of its proper divisors (3280248).

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

1521432 is a wasteful number, since it uses less digits than its factorization.

1521432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 146 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1521432 is about 1233.4634165633. The cubic root of 1521432 is about 115.0140373539.

Adding to 1521432 its reverse (2341251), we get a palindrome (3862683).

It can be divided in two parts, 1521 and 432, that added together give a triangular number (1953 = T₆₂).

The spelling of 1521432 in words is "one million, five hundred twenty-one thousand, four hundred thirty-two".