140138245 has 16 divisors (see below), whose sum is σ = 181828080. Its totient is φ = 103071744.

The previous prime is 140138239. The next prime is 140138263. The reversal of 140138245 is 542831041.

It is a Cunningham number, because it is equal to 11838²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 9972964 + 130165281 = 3158^2 + 11409^2 .

It is a cyclic number.

It is not a de Polignac number, because 140138245 - 2⁵ = 140138213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12511 + ... + 20899.

It is an arithmetic number, because the mean of its divisors is an integer number (11364255).

Almost surely, 2^140138245 is an apocalyptic number.

It is an amenable number.

140138245 is a deficient number, since it is larger than the sum of its proper divisors (41689835).

140138245 is a wasteful number, since it uses less digits than its factorization.

140138245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8664.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 140138245 is about 11838.0000422369. Note that the first 4 decimals coincide. The cubic root of 140138245 is about 519.4202673750.

Adding to 140138245 its reverse (542831041), we get a palindrome (682969286).

The spelling of 140138245 in words is "one hundred forty million, one hundred thirty-eight thousand, two hundred forty-five".