142451669 has 2 divisors, whose sum is σ = 142451670. Its totient is φ = 142451668.

The previous prime is 142451663. The next prime is 142451677. The reversal of 142451669 is 966154241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75047569 + 67404100 = 8663^2 + 8210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142451669 is a prime.

It is a super-2 number, since 2×142451669² = 40584956001771122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142451663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71225834 + 71225835.

It is an arithmetic number, because the mean of its divisors is an integer number (71225835).

Almost surely, 2^142451669 is an apocalyptic number.

It is an amenable number.

142451669 is a deficient number, since it is larger than the sum of its proper divisors (1).

142451669 is an equidigital number, since it uses as much as digits as its factorization.

142451669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 142451669 is about 11935.3118518118. The cubic root of 142451669 is about 522.2629056396.

The spelling of 142451669 in words is "one hundred forty-two million, four hundred fifty-one thousand, six hundred sixty-nine".