142681491 has 6 divisors (see below), whose sum is σ = 206095500. Its totient is φ = 95120988.

The previous prime is 142681481. The next prime is 142681523. The reversal of 142681491 is 194186241.

It is not a de Polignac number, because 142681491 - 2¹¹ = 142679443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142681481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7926741 + ... + 7926758.

It is an arithmetic number, because the mean of its divisors is an integer number (34349250).

Almost surely, 2^142681491 is an apocalyptic number.

142681491 is a deficient number, since it is larger than the sum of its proper divisors (63414009).

142681491 is a wasteful number, since it uses less digits than its factorization.

142681491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15853505 (or 15853502 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 142681491 is about 11944.9357888605. The cubic root of 142681491 is about 522.5436160869.

The spelling of 142681491 in words is "one hundred forty-two million, six hundred eighty-one thousand, four hundred ninety-one".