142671381 has 16 divisors (see below), whose sum is σ = 194061120. Its totient is φ = 93208320.

The previous prime is 142671379. The next prime is 142671391. The reversal of 142671381 is 183176241.

It is not a de Polignac number, because 142671381 - 2¹ = 142671379 is a prime.

It is a super-2 number, since 2×142671381² = 40710245912894322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142671301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64941 + ... + 67101.

It is an arithmetic number, because the mean of its divisors is an integer number (12128820).

Almost surely, 2^142671381 is an apocalyptic number.

It is an amenable number.

142671381 is a deficient number, since it is larger than the sum of its proper divisors (51389739).

142671381 is a wasteful number, since it uses less digits than its factorization.

142671381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596.

The product of its digits is 8064, while the sum is 33.

The square root of 142671381 is about 11944.5125894697. The cubic root of 142671381 is about 522.5312738162.

The spelling of 142671381 in words is "one hundred forty-two million, six hundred seventy-one thousand, three hundred eighty-one".