140212565 has 8 divisors (see below), whose sum is σ = 168708408. Its totient is φ = 111867840.

The previous prime is 140212559. The next prime is 140212603. The reversal of 140212565 is 565212041.

It can be written as a sum of positive squares in 4 ways, for example, as 21446161 + 118766404 = 4631^2 + 10898^2 .

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

It is not a de Polignac number, because 140212565 - 2¹⁰ = 140211541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35726 + ... + 39455.

It is an arithmetic number, because the mean of its divisors is an integer number (21088551).

Almost surely, 2^140212565 is an apocalyptic number.

It is an amenable number.

140212565 is a deficient number, since it is larger than the sum of its proper divisors (28495843).

140212565 is an equidigital number, since it uses as much as digits as its factorization.

140212565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75559.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 140212565 is about 11841.1386699084. The cubic root of 140212565 is about 519.5120731298.

The spelling of 140212565 in words is "one hundred forty million, two hundred twelve thousand, five hundred sixty-five".