1256132408 has 32 divisors (see below), whose sum is σ = 2501182800. Its totient is φ = 589736448.

The previous prime is 1256132357. The next prime is 1256132429. The reversal of 1256132408 is 8042316521.

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 7 ways as a sum of consecutive naturals, for example, 19391 + ... + 53742.

Almost surely, 2^1256132408 is an apocalyptic number.

It is an amenable number.

1256132408 is a deficient number, since it is larger than the sum of its proper divisors (1245050392).

1256132408 is a wasteful number, since it uses less digits than its factorization.

1256132408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73271 (or 73267 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1256132408 is about 35441.9582980399. The cubic root of 1256132408 is about 1078.9760551135.

Adding to 1256132408 its reverse (8042316521), we get a palindrome (9298448929).

The spelling of 1256132408 in words is "one billion, two hundred fifty-six million, one hundred thirty-two thousand, four hundred eight".