1087340621 has 8 divisors (see below), whose sum is σ = 1167074424. Its totient is φ = 1009359360.

The previous prime is 1087340591. The next prime is 1087340659. The reversal of 1087340621 is 1260437801.

It can be written as a sum of positive squares in 4 ways, for example, as 246050596 + 841290025 = 15686^2 + 29005^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1087340621 - 2¹⁰ = 1087339597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087340321) 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, 436850 + ... + 439331.

It is an arithmetic number, because the mean of its divisors is an integer number (145884303).

Almost surely, 2^1087340621 is an apocalyptic number.

It is an amenable number.

1087340621 is a deficient number, since it is larger than the sum of its proper divisors (79733803).

1087340621 is an equidigital number, since it uses as much as digits as its factorization.

1087340621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876271.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1087340621 is about 32974.8483089763. The cubic root of 1087340621 is about 1028.3048186522.

The spelling of 1087340621 in words is "one billion, eighty-seven million, three hundred forty thousand, six hundred twenty-one".