1071131956 has 6 divisors (see below), whose sum is σ = 1874480930. Its totient is φ = 535565976.

The previous prime is 1071131947. The next prime is 1071131969. The reversal of 1071131956 is 6591311701.

It can be written as a sum of positive squares in only one way, i.e., 980691856 + 90440100 = 31316^2 + 9510^2 .

It is a super-2 number, since 2×1071131956² = 2294647334328771872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133891491 + ... + 133891498.

Almost surely, 2^1071131956 is an apocalyptic number.

It is an amenable number.

1071131956 is a deficient number, since it is larger than the sum of its proper divisors (803348974).

1071131956 is a wasteful number, since it uses less digits than its factorization.

1071131956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267782993 (or 267782991 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 1071131956 is about 32728.1523462599. The cubic root of 1071131956 is about 1023.1696722030.

The spelling of 1071131956 in words is "one billion, seventy-one million, one hundred thirty-one thousand, nine hundred fifty-six".