140102001 has 16 divisors (see below), whose sum is σ = 223525120. Its totient is φ = 86216400.

The previous prime is 140101999. The next prime is 140102003. The reversal of 140102001 is 100201041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (140101999) and next prime (140102003).

It is not a de Polignac number, because 140102001 - 2¹ = 140101999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (140102003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199225 + ... + 199926.

It is an arithmetic number, because the mean of its divisors is an integer number (13970320).

Almost surely, 2^140102001 is an apocalyptic number.

It is an amenable number.

140102001 is a deficient number, since it is larger than the sum of its proper divisors (83423119).

140102001 is a wasteful number, since it uses less digits than its factorization.

140102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399173 (or 399167 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 140102001 is about 11836.4691103386. The cubic root of 140102001 is about 519.3754842363.

Adding to 140102001 its reverse (100201041), we get a palindrome (240303042).

The spelling of 140102001 in words is "one hundred forty million, one hundred two thousand, one".