140342401 has 2 divisors, whose sum is σ = 140342402. Its totient is φ = 140342400.

The previous prime is 140342399. The next prime is 140342437. The reversal of 140342401 is 104243041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108993600 + 31348801 = 10440^2 + 5599^2 .

It is a cyclic number.

It is not a de Polignac number, because 140342401 - 2¹ = 140342399 is a prime.

Together with 140342399, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140342491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70171200 + 70171201.

It is an arithmetic number, because the mean of its divisors is an integer number (70171201).

Almost surely, 2^140342401 is an apocalyptic number.

It is an amenable number.

140342401 is a deficient number, since it is larger than the sum of its proper divisors (1).

140342401 is an equidigital number, since it uses as much as digits as its factorization.

140342401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140342401 is about 11846.6198132632. The cubic root of 140342401 is about 519.6723786877.

Adding to 140342401 its reverse (104243041), we get a palindrome (244585442).

The spelling of 140342401 in words is "one hundred forty million, three hundred forty-two thousand, four hundred one".