140266487 has 4 divisors (see below), whose sum is σ = 140293296. Its totient is φ = 140239680.

The previous prime is 140266481. The next prime is 140266499. The reversal of 140266487 is 784662041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784662041 = 16139 ⋅48619.

It is a cyclic number.

It is not a de Polignac number, because 140266487 - 2¹² = 140262391 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 140266487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140266481) 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, 2714 + ... + 16967.

It is an arithmetic number, because the mean of its divisors is an integer number (35073324).

Almost surely, 2^140266487 is an apocalyptic number.

140266487 is a deficient number, since it is larger than the sum of its proper divisors (26809).

140266487 is an equidigital number, since it uses as much as digits as its factorization.

140266487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26808.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 140266487 is about 11843.4153435569. The cubic root of 140266487 is about 519.5786614077.

The spelling of 140266487 in words is "one hundred forty million, two hundred sixty-six thousand, four hundred eighty-seven".