1081261397 has 8 divisors (see below), whose sum is σ = 1111728000. Its totient is φ = 1050860304.

The previous prime is 1081261351. The next prime is 1081261399. The reversal of 1081261397 is 7931621801.

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

It is a cyclic number.

It is not a de Polignac number, because 1081261397 - 2⁸ = 1081261141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1081261397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081261399) 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, 18104 + ... + 49902.

It is an arithmetic number, because the mean of its divisors is an integer number (138966000).

Almost surely, 2^1081261397 is an apocalyptic number.

It is an amenable number.

1081261397 is a deficient number, since it is larger than the sum of its proper divisors (30466603).

1081261397 is an equidigital number, since it uses as much as digits as its factorization.

1081261397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32755.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1081261397 is about 32882.5393940310. The cubic root of 1081261397 is about 1026.3848493628.

The spelling of 1081261397 in words is "one billion, eighty-one million, two hundred sixty-one thousand, three hundred ninety-seven".