1081601271 has 12 divisors (see below), whose sum is σ = 1595554272. Its totient is φ = 705725376.

The previous prime is 1081601267. The next prime is 1081601299. The reversal of 1081601271 is 1721061801.

It is not a de Polignac number, because 1081601271 - 2² = 1081601267 is a prime.

It is a super-2 number, since 2×1081601271² = 2339722618857630882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081600271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1278066 + ... + 1278911.

It is an arithmetic number, because the mean of its divisors is an integer number (132962856).

Almost surely, 2^1081601271 is an apocalyptic number.

1081601271 is a deficient number, since it is larger than the sum of its proper divisors (513953001).

1081601271 is a wasteful number, since it uses less digits than its factorization.

1081601271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557030 (or 2557027 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 1081601271 is about 32887.7069890864. The cubic root of 1081601271 is about 1026.4923796298.

The spelling of 1081601271 in words is "one billion, eighty-one million, six hundred one thousand, two hundred seventy-one".