140280269 has 4 divisors (see below), whose sum is σ = 140350140. Its totient is φ = 140210400.

The previous prime is 140280253. The next prime is 140280271. The reversal of 140280269 is 962082041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43494025 + 96786244 = 6595^2 + 9838^2 .

It is a cyclic number.

It is not a de Polignac number, because 140280269 - 2⁴ = 140280253 is a prime.

It is a super-2 number, since 2×140280269² = 39357107741424722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140280299) 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, 31832 + ... + 35969.

It is an arithmetic number, because the mean of its divisors is an integer number (35087535).

Almost surely, 2^140280269 is an apocalyptic number.

It is an amenable number.

140280269 is a deficient number, since it is larger than the sum of its proper divisors (69871).

140280269 is an equidigital number, since it uses as much as digits as its factorization.

140280269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69870.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 140280269 is about 11843.9971715633. The cubic root of 140280269 is about 519.5956780611.

The spelling of 140280269 in words is "one hundred forty million, two hundred eighty thousand, two hundred sixty-nine".