142021451 has 48 divisors (see below), whose sum is σ = 183399552. Its totient is φ = 108810240.

The previous prime is 142021393. The next prime is 142021463. The reversal of 142021451 is 154120241.

It is a happy number.

142021451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142021451 - 2¹⁴ = 142005067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142021151) 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, 1256771 + ... + 1256883.

It is an arithmetic number, because the mean of its divisors is an integer number (3820824).

Almost surely, 2^142021451 is an apocalyptic number.

142021451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142021451 is a deficient number, since it is larger than the sum of its proper divisors (41378101).

142021451 is a wasteful number, since it uses less digits than its factorization.

142021451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 142021451 is about 11917.2753177897. The cubic root of 142021451 is about 521.7366137476.

Adding to 142021451 its reverse (154120241), we get a palindrome (296141692).

The spelling of 142021451 in words is "one hundred forty-two million, twenty-one thousand, four hundred fifty-one".