1532440645 has 4 divisors (see below), whose sum is σ = 1838928780. Its totient is φ = 1225952512.

The previous prime is 1532440633. The next prime is 1532440661. The reversal of 1532440645 is 5460442351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 545035716 + 987404929 = 23346^2 + 31423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1532440645 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1532440645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153244060 + ... + 153244069.

It is an arithmetic number, because the mean of its divisors is an integer number (459732195).

Almost surely, 2^1532440645 is an apocalyptic number.

It is an amenable number.

1532440645 is a deficient number, since it is larger than the sum of its proper divisors (306488135).

1532440645 is an equidigital number, since it uses as much as digits as its factorization.

1532440645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306488134.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 1532440645 is about 39146.4001537817. The cubic root of 1532440645 is about 1152.9077380894.

Adding to 1532440645 its reverse (5460442351), we get a palindrome (6992882996).

The spelling of 1532440645 in words is "one billion, five hundred thirty-two million, four hundred forty thousand, six hundred forty-five".