1081262653 has 4 divisors (see below), whose sum is σ = 1081601980. Its totient is φ = 1080923328.

The previous prime is 1081262627. The next prime is 1081262657. The reversal of 1081262653 is 3562621801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3562621801 = 58441 ⋅60961.

It can be written as a sum of positive squares in 2 ways, for example, as 1021633369 + 59629284 = 31963^2 + 7722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081262653 - 2²¹ = 1079165501 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 (1081262657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164838 + ... + 171271.

It is an arithmetic number, because the mean of its divisors is an integer number (270400495).

Almost surely, 2^1081262653 is an apocalyptic number.

It is an amenable number.

1081262653 is a deficient number, since it is larger than the sum of its proper divisors (339327).

1081262653 is an equidigital number, since it uses as much as digits as its factorization.

1081262653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339326.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1081262653 is about 32882.5584923071. The cubic root of 1081262653 is about 1026.3852467810.

The spelling of 1081262653 in words is "one billion, eighty-one million, two hundred sixty-two thousand, six hundred fifty-three".