1087891541 has 16 divisors (see below), whose sum is σ = 1216373760. Its totient is φ = 964644720.

The previous prime is 1087891517. The next prime is 1087891543. The reversal of 1087891541 is 1451987801.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1087891541 - 2⁶ = 1087891477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1087891492 and 1087891501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087891543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64586 + ... + 79668.

It is an arithmetic number, because the mean of its divisors is an integer number (76023360).

Almost surely, 2^1087891541 is an apocalyptic number.

1087891541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1087891541 is a deficient number, since it is larger than the sum of its proper divisors (128482219).

1087891541 is a wasteful number, since it uses less digits than its factorization.

1087891541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15256.

The product of its (nonzero) digits is 80640, while the sum is 44.

The square root of 1087891541 is about 32983.2008907565. The cubic root of 1087891541 is about 1028.4784588249.

The spelling of 1087891541 in words is "one billion, eighty-seven million, eight hundred ninety-one thousand, five hundred forty-one".