1355121432 has 48 divisors (see below), whose sum is σ = 4194425040. Its totient is φ = 387177408.

The previous prime is 1355121421. The next prime is 1355121451. The reversal of 1355121432 is 2341215531.

1355121432 is a `hidden beast` number, since 1 + 3 + 5 + 512 + 143 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1355121396 and 1355121405.

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 11 ways as a sum of consecutive naturals, for example, 1343863 + ... + 1344870.

It is an arithmetic number, because the mean of its divisors is an integer number (87383855).

Almost surely, 2^1355121432 is an apocalyptic number.

1355121432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1355121432 is an abundant number, since it is smaller than the sum of its proper divisors (2839303608).

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

1355121432 is a wasteful number, since it uses less digits than its factorization.

1355121432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688752 (or 2688745 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1355121432 is about 36811.9740301984. The cubic root of 1355121432 is about 1106.6052798162.

Adding to 1355121432 its reverse (2341215531), we get a palindrome (3696336963).

The spelling of 1355121432 in words is "one billion, three hundred fifty-five million, one hundred twenty-one thousand, four hundred thirty-two".