1669429142 has 8 divisors (see below), whose sum is σ = 2504955432. Its totient is φ = 834444000.

The previous prime is 1669429141. The next prime is 1669429147. The reversal of 1669429142 is 2419249661.

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

It is a junction number, because it is equal to n+sod(n) for n = 1669429093 and 1669429102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669429141) 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, 127484 + ... + 139967.

It is an arithmetic number, because the mean of its divisors is an integer number (313119429).

Almost surely, 2^1669429142 is an apocalyptic number.

1669429142 is a deficient number, since it is larger than the sum of its proper divisors (835526290).

1669429142 is a wasteful number, since it uses less digits than its factorization.

1669429142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270574.

The product of its digits is 186624, while the sum is 44.

The square root of 1669429142 is about 40858.6483134232. The cubic root of 1669429142 is about 1186.2857952492.

The spelling of 1669429142 in words is "one billion, six hundred sixty-nine million, four hundred twenty-nine thousand, one hundred forty-two".