142801669 has 4 divisors (see below), whose sum is σ = 142826944. Its totient is φ = 142776396.

The previous prime is 142801643. The next prime is 142801679. The reversal of 142801669 is 966108241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142801669 - 2¹⁷ = 142670597 is a prime.

It is a super-2 number, since 2×142801669² = 40784633338371122, 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 (142801619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154 + ... + 16900.

It is an arithmetic number, because the mean of its divisors is an integer number (35706736).

Almost surely, 2^142801669 is an apocalyptic number.

It is an amenable number.

142801669 is a deficient number, since it is larger than the sum of its proper divisors (25275).

142801669 is an equidigital number, since it uses as much as digits as its factorization.

142801669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25274.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 142801669 is about 11949.9652300749. The cubic root of 142801669 is about 522.6902845469.

The spelling of 142801669 in words is "one hundred forty-two million, eight hundred one thousand, six hundred sixty-nine".