140436001 has 4 divisors (see below), whose sum is σ = 140588100. Its totient is φ = 140283904.

The previous prime is 140435993. The next prime is 140436007. The reversal of 140436001 is 100634041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100634041 = 409 ⋅246049.

It can be written as a sum of positive squares in 2 ways, for example, as 70963776 + 69472225 = 8424^2 + 8335^2 .

It is a cyclic number.

It is not a de Polignac number, because 140436001 - 2³ = 140435993 is a prime.

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 140436001.

It is not an unprimeable number, because it can be changed into a prime (140436007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74656 + ... + 76513.

It is an arithmetic number, because the mean of its divisors is an integer number (35147025).

Almost surely, 2^140436001 is an apocalyptic number.

It is an amenable number.

140436001 is a deficient number, since it is larger than the sum of its proper divisors (152099).

140436001 is an equidigital number, since it uses as much as digits as its factorization.

140436001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152098.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 140436001 is about 11850.5696487553. The cubic root of 140436001 is about 519.7878831603.

The spelling of 140436001 in words is "one hundred forty million, four hundred thirty-six thousand, one".