1581152 has 12 divisors (see below), whose sum is σ = 3112956. Its totient is φ = 790560.

The previous prime is 1581131. The next prime is 1581157. The reversal of 1581152 is 2511851.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24674 + ... + 24737.

It is an arithmetic number, because the mean of its divisors is an integer number (259413).

2^1581152 is an apocalyptic number.

It is an amenable number.

1581152 is a deficient number, since it is larger than the sum of its proper divisors (1531804).

1581152 is an equidigital number, since it uses as much as digits as its factorization.

1581152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49421 (or 49413 counting only the distinct ones).

The product of its digits is 400, while the sum is 23.

The square root of 1581152 is about 1257.4386664963. The cubic root of 1581152 is about 116.4996285301.

The spelling of 1581152 in words is "one million, five hundred eighty-one thousand, one hundred fifty-two".