1285541472 has 24 divisors (see below), whose sum is σ = 3374546616. Its totient is φ = 428513792.

The previous prime is 1285541471. The next prime is 1285541473. The reversal of 1285541472 is 2741455821.

It is an interprime number because it is at equal distance from previous prime (1285541471) and next prime (1285541473).

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1285541472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285541471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6695433 + ... + 6695624.

It is an arithmetic number, because the mean of its divisors is an integer number (140606109).

Almost surely, 2^1285541472 is an apocalyptic number.

1285541472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1285541472 is an abundant number, since it is smaller than the sum of its proper divisors (2089005144).

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

1285541472 is a wasteful number, since it uses less digits than its factorization.

1285541472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13391070 (or 13391062 counting only the distinct ones).

The product of its digits is 89600, while the sum is 39.

The square root of 1285541472 is about 35854.4484269386. The cubic root of 1285541472 is about 1087.3316523130.

The spelling of 1285541472 in words is "one billion, two hundred eighty-five million, five hundred forty-one thousand, four hundred seventy-two".