142581428 has 24 divisors (see below), whose sum is σ = 272601504. Its totient is φ = 64714400.

The previous prime is 142581407. The next prime is 142581433. The reversal of 142581428 is 824185241.

It is a super-2 number, since 2×142581428² = 40658927221038368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34151 + ... + 38097.

It is an arithmetic number, because the mean of its divisors is an integer number (11358396).

Almost surely, 2^142581428 is an apocalyptic number.

It is an amenable number.

142581428 is a deficient number, since it is larger than the sum of its proper divisors (130020076).

142581428 is a wasteful number, since it uses less digits than its factorization.

142581428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783 (or 4781 counting only the distinct ones).

The product of its digits is 20480, while the sum is 35.

The square root of 142581428 is about 11940.7465428255. The cubic root of 142581428 is about 522.4214336666.

The spelling of 142581428 in words is "one hundred forty-two million, five hundred eighty-one thousand, four hundred twenty-eight".