140278555 has 4 divisors (see below), whose sum is σ = 168334272. Its totient is φ = 112222840.

The previous prime is 140278553. The next prime is 140278559. The reversal of 140278555 is 555872041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555872041 = 1201 ⋅462841.

It is not a de Polignac number, because 140278555 - 2¹ = 140278553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140278553) 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, 14027851 + ... + 14027860.

It is an arithmetic number, because the mean of its divisors is an integer number (42083568).

Almost surely, 2^140278555 is an apocalyptic number.

140278555 is a deficient number, since it is larger than the sum of its proper divisors (28055717).

140278555 is an equidigital number, since it uses as much as digits as its factorization.

140278555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28055716.

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 140278555 is about 11843.9248140133. The cubic root of 140278555 is about 519.5935618438.

The spelling of 140278555 in words is "one hundred forty million, two hundred seventy-eight thousand, five hundred fifty-five".