142019091 has 48 divisors (see below), whose sum is σ = 226570240. Its totient is φ = 85380480.

The previous prime is 142019057. The next prime is 142019093. The reversal of 142019091 is 190910241.

It is not a de Polignac number, because 142019091 - 2⁷ = 142018963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142019093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386790 + ... + 387156.

Almost surely, 2^142019091 is an apocalyptic number.

142019091 is a deficient number, since it is larger than the sum of its proper divisors (84551149).

142019091 is a wasteful number, since it uses less digits than its factorization.

142019091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 142019091 is about 11917.1763014567. The cubic root of 142019091 is about 521.7337237963.

The spelling of 142019091 in words is "one hundred forty-two million, nineteen thousand, ninety-one".