140805001 has 8 divisors (see below), whose sum is σ = 142742600. Its totient is φ = 138879360.

The previous prime is 140804987. The next prime is 140805013. The reversal of 140805001 is 100508041.

It can be written as a sum of positive squares in 4 ways, for example, as 111091600 + 29713401 = 10540^2 + 5451^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 140805001 - 2¹³ = 140796809 is a prime.

It is a super-2 number, since 2×140805001² = 39652096613220002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140805001.

It is not an unprimeable number, because it can be changed into a prime (140805061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22141 + ... + 27781.

It is an arithmetic number, because the mean of its divisors is an integer number (17842825).

Almost surely, 2^140805001 is an apocalyptic number.

It is an amenable number.

140805001 is a deficient number, since it is larger than the sum of its proper divisors (1937599).

140805001 is a wasteful number, since it uses less digits than its factorization.

140805001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 140805001 is about 11866.1283070764. The cubic root of 140805001 is about 520.2427380027.

The spelling of 140805001 in words is "one hundred forty million, eight hundred five thousand, one".