1087651 has 4 divisors (see below), whose sum is σ = 1094112. Its totient is φ = 1081192.

The previous prime is 1087631. The next prime is 1087657. The reversal of 1087651 is 1567801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1567801 = 37 ⋅42373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1087651 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2971 + ... + 3316.

It is an arithmetic number, because the mean of its divisors is an integer number (273528).

2^1087651 is an apocalyptic number.

1087651 is a deficient number, since it is larger than the sum of its proper divisors (6461).

1087651 is an equidigital number, since it uses as much as digits as its factorization.

1087651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1087651 is about 1042.9050771763. The cubic root of 1087651 is about 102.8402651797.

The spelling of 1087651 in words is "one million, eighty-seven thousand, six hundred fifty-one".