140215745 has 8 divisors (see below), whose sum is σ = 178156584. Its totient is φ = 105574144.

The previous prime is 140215741. The next prime is 140215753. The reversal of 140215745 is 547512041.

It can be written as a sum of positive squares in 4 ways, for example, as 53129521 + 87086224 = 7289^2 + 9332^2 .

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 140215745 - 2² = 140215741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140215741) 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, 824714 + ... + 824883.

It is an arithmetic number, because the mean of its divisors is an integer number (22269573).

Almost surely, 2^140215745 is an apocalyptic number.

It is an amenable number.

140215745 is a deficient number, since it is larger than the sum of its proper divisors (37940839).

140215745 is a wasteful number, since it uses less digits than its factorization.

140215745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649619.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 140215745 is about 11841.2729467739. The cubic root of 140215745 is about 519.5160005854.

Adding to 140215745 its reverse (547512041), we get a palindrome (687727786).

The spelling of 140215745 in words is "one hundred forty million, two hundred fifteen thousand, seven hundred forty-five".