1325681540 has 24 divisors (see below), whose sum is σ = 2812635672. Its totient is φ = 524805120.

The previous prime is 1325681519. The next prime is 1325681549. The reversal of 1325681540 is 451865231.

It can be written as a sum of positive squares in 4 ways, for example, as 10023556 + 1315657984 = 3166^2 + 36272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1325681540.

It is not an unprimeable number, because it can be changed into a prime (1325681549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339731 + ... + 343610.

It is an arithmetic number, because the mean of its divisors is an integer number (117193153).

Almost surely, 2^1325681540 is an apocalyptic number.

1325681540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1325681540 is an abundant number, since it is smaller than the sum of its proper divisors (1486954132).

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

1325681540 is a wasteful number, since it uses less digits than its factorization.

1325681540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683447 (or 683445 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1325681540 is about 36409.9099147471. The cubic root of 1325681540 is about 1098.5329036725.

The spelling of 1325681540 in words is "one billion, three hundred twenty-five million, six hundred eighty-one thousand, five hundred forty".