142821550 has 12 divisors (see below), whose sum is σ = 265648176. Its totient is φ = 57128600.

The previous prime is 142821529. The next prime is 142821577. The reversal of 142821550 is 55128241.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428166 + ... + 1428265.

It is an arithmetic number, because the mean of its divisors is an integer number (22137348).

Almost surely, 2^142821550 is an apocalyptic number.

142821550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142821550 is a deficient number, since it is larger than the sum of its proper divisors (122826626).

142821550 is a wasteful number, since it uses less digits than its factorization.

142821550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856443 (or 2856438 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 142821550 is about 11950.7970445490. The cubic root of 142821550 is about 522.7145399201.

Adding to 142821550 its reverse (55128241), we get a palindrome (197949791).

The spelling of 142821550 in words is "one hundred forty-two million, eight hundred twenty-one thousand, five hundred fifty".