1340867181 has 24 divisors (see below), whose sum is σ = 1835991840. Its totient is φ = 870262272.

The previous prime is 1340867159. The next prime is 1340867191. The reversal of 1340867181 is 1817680431.

It is not a de Polignac number, because 1340867181 - 2¹¹ = 1340865133 is a prime.

It is a super-2 number, since 2×1340867181² = 3595849594165773522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340867191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1890855 + ... + 1891563.

It is an arithmetic number, because the mean of its divisors is an integer number (76499660).

Almost surely, 2^1340867181 is an apocalyptic number.

It is an amenable number.

1340867181 is a deficient number, since it is larger than the sum of its proper divisors (495124659).

1340867181 is an frugal number, since it uses more digits than its factorization.

1340867181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 1340867181 is about 36617.8533095538. The cubic root of 1340867181 is about 1102.7115421331.

The spelling of 1340867181 in words is "one billion, three hundred forty million, eight hundred sixty-seven thousand, one hundred eighty-one".