1086421 has 4 divisors (see below), whose sum is σ = 1241632. Its totient is φ = 931212.

The previous prime is 1086413. The next prime is 1086433. The reversal of 1086421 is 1246801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1246801 = 89 ⋅14009.

It is a cyclic number.

It is not a de Polignac number, because 1086421 - 2³ = 1086413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1086392 and 1086401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086461) 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, 77595 + ... + 77608.

It is an arithmetic number, because the mean of its divisors is an integer number (310408).

2^1086421 is an apocalyptic number.

It is an amenable number.

1086421 is a deficient number, since it is larger than the sum of its proper divisors (155211).

1086421 is an equidigital number, since it uses as much as digits as its factorization.

1086421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155210.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1086421 is about 1042.3152114404. The cubic root of 1086421 is about 102.8014839778.

The spelling of 1086421 in words is "one million, eighty-six thousand, four hundred twenty-one".