1087641 has 8 divisors (see below), whose sum is σ = 1611360. Its totient is φ = 725076.

The previous prime is 1087631. The next prime is 1087657. The reversal of 1087641 is 1467801.

It is a happy number.

1087641 is a `hidden beast` number, since 10 + 8 + 7 + 641 = 666.

It is not a de Polignac number, because 1087641 - 2⁹ = 1087129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 40283 = 1087641 / (1 + 0 + 8 + 7 + 6 + 4 + 1).

It is not an unprimeable number, because it can be changed into a prime (1087621) 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, 20115 + ... + 20168.

It is an arithmetic number, because the mean of its divisors is an integer number (201420).

2^1087641 is an apocalyptic number.

It is an amenable number.

1087641 is a deficient number, since it is larger than the sum of its proper divisors (523719).

1087641 is an equidigital number, since it uses as much as digits as its factorization.

1087641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40292 (or 40286 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1087641 is about 1042.9002828650. The cubic root of 1087641 is about 102.8399500033.

It can be divided in two parts, 1087 and 641, that added together give a cube (1728 = 12³).

The spelling of 1087641 in words is "one million, eighty-seven thousand, six hundred forty-one".