1087381 has 2 divisors, whose sum is σ = 1087382. Its totient is φ = 1087380.

The previous prime is 1087379. The next prime is 1087391. The reversal of 1087381 is 1837801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1069156 + 18225 = 1034^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087381 - 2¹ = 1087379 is a prime.

It is a super-2 number, since 2×1087381² = 2364794878322, which contains 22 as substring.

Together with 1087379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1087301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543690 + 543691.

It is an arithmetic number, because the mean of its divisors is an integer number (543691).

2^1087381 is an apocalyptic number.

It is an amenable number.

1087381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087381 is an equidigital number, since it uses as much as digits as its factorization.

1087381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1087381 is about 1042.7756230369. The cubic root of 1087381 is about 102.8317547385.

The spelling of 1087381 in words is "one million, eighty-seven thousand, three hundred eighty-one".