141613781 has 4 divisors (see below), whose sum is σ = 142913100. Its totient is φ = 140314464.

The previous prime is 141613777. The next prime is 141613793. The reversal of 141613781 is 187316141.

141613781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69872881 + 71740900 = 8359^2 + 8470^2 .

It is a cyclic number.

It is not a de Polignac number, because 141613781 - 2² = 141613777 is a prime.

It is a super-2 number, since 2×141613781² = 40108925938231922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141613711) 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, 649496 + ... + 649713.

It is an arithmetic number, because the mean of its divisors is an integer number (35728275).

Almost surely, 2^141613781 is an apocalyptic number.

It is an amenable number.

141613781 is a deficient number, since it is larger than the sum of its proper divisors (1299319).

141613781 is a wasteful number, since it uses less digits than its factorization.

141613781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299318.

The product of its digits is 4032, while the sum is 32.

The square root of 141613781 is about 11900.1588644858. The cubic root of 141613781 is about 521.2369234950.

The spelling of 141613781 in words is "one hundred forty-one million, six hundred thirteen thousand, seven hundred eighty-one".