142691401 has 2 divisors, whose sum is σ = 142691402. Its totient is φ = 142691400.

The previous prime is 142691399. The next prime is 142691443. The reversal of 142691401 is 104196241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138180025 + 4511376 = 11755^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 142691401 - 2¹ = 142691399 is a prime.

Together with 142691399, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 142691401.

It is not a weakly prime, because it can be changed into another prime (142692401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71345700 + 71345701.

It is an arithmetic number, because the mean of its divisors is an integer number (71345701).

Almost surely, 2^142691401 is an apocalyptic number.

It is an amenable number.

142691401 is a deficient number, since it is larger than the sum of its proper divisors (1).

142691401 is an equidigital number, since it uses as much as digits as its factorization.

142691401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 142691401 is about 11945.3506018032. The cubic root of 142691401 is about 522.5557136321. Note that the first 3 decimals are identical.

The spelling of 142691401 in words is "one hundred forty-two million, six hundred ninety-one thousand, four hundred one".