1081266421 has 16 divisors (see below), whose sum is σ = 1180627200. Its totient is φ = 986344128.

The previous prime is 1081266367. The next prime is 1081266449. The reversal of 1081266421 is 1246621801.

It is a cyclic number.

It is not a de Polignac number, because 1081266421 - 2¹³ = 1081258229 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 (1081266721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216276 + ... + 221218.

It is an arithmetic number, because the mean of its divisors is an integer number (73789200).

Almost surely, 2^1081266421 is an apocalyptic number.

It is an amenable number.

1081266421 is a deficient number, since it is larger than the sum of its proper divisors (99360779).

1081266421 is a wasteful number, since it uses less digits than its factorization.

1081266421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5388.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1081266421 is about 32882.6157870690. The cubic root of 1081266421 is about 1026.3864390337.

The spelling of 1081266421 in words is "one billion, eighty-one million, two hundred sixty-six thousand, four hundred twenty-one".