1551432 has 32 divisors (see below), whose sum is σ = 3916800. Its totient is φ = 512064.

The previous prime is 1551383. The next prime is 1551449. The reversal of 1551432 is 2341551.

It is a junction number, because it is equal to n+sod(n) for n = 1551399 and 1551408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2794 + ... + 3302.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2^1551432 is an apocalyptic number.

1551432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1551432 is an abundant number, since it is smaller than the sum of its proper divisors (2365368).

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

1551432 is a wasteful number, since it uses less digits than its factorization.

1551432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 641 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 1551432 is about 1245.5649320690. The cubic root of 1551432 is about 115.7650814503.

Adding to 1551432 its reverse (2341551), we get a palindrome (3892983).

The spelling of 1551432 in words is "one million, five hundred fifty-one thousand, four hundred thirty-two".