1538577142 has 16 divisors (see below), whose sum is σ = 2398807152. Its totient is φ = 739476000.

The previous prime is 1538577133. The next prime is 1538577143. The reversal of 1538577142 is 2417758351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538577143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119109 + ... + 131392.

It is an arithmetic number, because the mean of its divisors is an integer number (149925447).

Almost surely, 2^1538577142 is an apocalyptic number.

1538577142 is a deficient number, since it is larger than the sum of its proper divisors (860230010).

1538577142 is a wasteful number, since it uses less digits than its factorization.

1538577142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250623.

The product of its digits is 235200, while the sum is 43.

The square root of 1538577142 is about 39224.7006617004. The cubic root of 1538577142 is about 1154.4445876897. Note that the first 3 decimals are identical.

The spelling of 1538577142 in words is "one billion, five hundred thirty-eight million, five hundred seventy-seven thousand, one hundred forty-two".