1087647 has 16 divisors (see below), whose sum is σ = 1651968. Its totient is φ = 630080.

The previous prime is 1087631. The next prime is 1087657. The reversal of 1087647 is 7467801.

It is not a de Polignac number, because 1087647 - 2⁴ = 1087631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

1087647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087657) 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, 43 + ... + 1475.

It is an arithmetic number, because the mean of its divisors is an integer number (103248).

2^1087647 is an apocalyptic number.

1087647 is a deficient number, since it is larger than the sum of its proper divisors (564321).

1087647 is a wasteful number, since it uses less digits than its factorization.

1087647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 1087647 is about 1042.9031594544. The cubic root of 1087647 is about 102.8401391094.

The spelling of 1087647 in words is "one million, eighty-seven thousand, six hundred forty-seven".