1071861137 has 4 divisors (see below), whose sum is σ = 1078688436. Its totient is φ = 1065033840.

The previous prime is 1071861127. The next prime is 1071861181. The reversal of 1071861137 is 7311681701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7311681701 = 46309 ⋅157889.

It can be written as a sum of positive squares in 2 ways, for example, as 166513216 + 905347921 = 12904^2 + 30089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071861137 is a prime.

It is a super-2 number, since 2×1071861137² = 2297772594021865538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1071861097 and 1071861106.

It is not an unprimeable number, because it can be changed into a prime (1071861127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3413414 + ... + 3413727.

It is an arithmetic number, because the mean of its divisors is an integer number (269672109).

Almost surely, 2^1071861137 is an apocalyptic number.

It is an amenable number.

1071861137 is a deficient number, since it is larger than the sum of its proper divisors (6827299).

1071861137 is an equidigital number, since it uses as much as digits as its factorization.

1071861137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6827298.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 1071861137 is about 32739.2904168676. The cubic root of 1071861137 is about 1023.4017963111.

The spelling of 1071861137 in words is "one billion, seventy-one million, eight hundred sixty-one thousand, one hundred thirty-seven".