1086972421 has 4 divisors (see below), whose sum is σ = 1116350092. Its totient is φ = 1057594752.

The previous prime is 1086972413. The next prime is 1086972449. The reversal of 1086972421 is 1242796801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242796801 = 89 ⋅13964009.

It can be written as a sum of positive squares in 2 ways, for example, as 661004100 + 425968321 = 25710^2 + 20639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1086972421 - 2³ = 1086972413 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 (1086972721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14688780 + ... + 14688853.

It is an arithmetic number, because the mean of its divisors is an integer number (279087523).

Almost surely, 2^1086972421 is an apocalyptic number.

It is an amenable number.

1086972421 is a deficient number, since it is larger than the sum of its proper divisors (29377671).

1086972421 is an equidigital number, since it uses as much as digits as its factorization.

1086972421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29377670.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1086972421 is about 32969.2647931373. The cubic root of 1086972421 is about 1028.1887358683.

The spelling of 1086972421 in words is "one billion, eighty-six million, nine hundred seventy-two thousand, four hundred twenty-one".