142693021 has 8 divisors (see below), whose sum is σ = 155383200. Its totient is φ = 130520880.

The previous prime is 142692961. The next prime is 142693063. The reversal of 142693021 is 120396241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-142693021 is a prime.

It is a super-2 number, since 2×142693021² = 40722596484212882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142697021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 128935 + ... + 130036.

It is an arithmetic number, because the mean of its divisors is an integer number (19422900).

Almost surely, 2^142693021 is an apocalyptic number.

It is an amenable number.

142693021 is a deficient number, since it is larger than the sum of its proper divisors (12690179).

142693021 is a wasteful number, since it uses less digits than its factorization.

142693021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259019.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 142693021 is about 11945.4184104200. The cubic root of 142693021 is about 522.5576911795.

The spelling of 142693021 in words is "one hundred forty-two million, six hundred ninety-three thousand, twenty-one".