1087251540 has 72 divisors (see below), whose sum is σ = 3103308768. Its totient is φ = 284419200.

The previous prime is 1087251527. The next prime is 1087251547. The reversal of 1087251540 is 451527801.

It is a super-2 number, since 2×1087251540² = 2364231822464743200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087251547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165315 + ... + 171765.

Almost surely, 2^1087251540 is an apocalyptic number.

1087251540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1087251540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551654384).

1087251540 is an abundant number, since it is smaller than the sum of its proper divisors (2016057228).

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

1087251540 is a wasteful number, since it uses less digits than its factorization.

1087251540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6569 (or 6514 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 1087251540 is about 32973.4975396909. The cubic root of 1087251540 is about 1028.2767363992.

The spelling of 1087251540 in words is "one billion, eighty-seven million, two hundred fifty-one thousand, five hundred forty".