1405323252 has 18 divisors (see below), whose sum is σ = 3552344978. Its totient is φ = 468441072.

The previous prime is 1405323247. The next prime is 1405323289. The reversal of 1405323252 is 2523235041.

It is a happy number.

1405323252 is a `hidden beast` number, since 1 + 405 + 3 + 2 + 3 + 252 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1238758416 + 166564836 = 35196^2 + 12906^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1405323252² = 3949866885223711008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19518343 + ... + 19518414.

Almost surely, 2^1405323252 is an apocalyptic number.

1405323252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1405323252 is an abundant number, since it is smaller than the sum of its proper divisors (2147021726).

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

1405323252 is a wasteful number, since it uses less digits than its factorization.

1405323252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39036767 (or 39036762 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1405323252 is about 37487.6413235082. The cubic root of 1405323252 is about 1120.1050209768.

Adding to 1405323252 its reverse (2523235041), we get a palindrome (3928558293).

The spelling of 1405323252 in words is "one billion, four hundred five million, three hundred twenty-three thousand, two hundred fifty-two".