142473771 has 12 divisors (see below), whose sum is σ = 224504280. Its totient is φ = 86347680.

The previous prime is 142473769. The next prime is 142473833. The reversal of 142473771 is 177374241.

It is not a de Polignac number, because 142473771 - 2¹ = 142473769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142473371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 719466 + ... + 719663.

It is an arithmetic number, because the mean of its divisors is an integer number (18708690).

Almost surely, 2^142473771 is an apocalyptic number.

142473771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142473771 is a deficient number, since it is larger than the sum of its proper divisors (82030509).

142473771 is a wasteful number, since it uses less digits than its factorization.

142473771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439146 (or 1439143 counting only the distinct ones).

The product of its digits is 32928, while the sum is 36.

The square root of 142473771 is about 11936.2377238391. The cubic root of 142473771 is about 522.2899147014.

The spelling of 142473771 in words is "one hundred forty-two million, four hundred seventy-three thousand, seven hundred seventy-one".