140278454 has 4 divisors (see below), whose sum is σ = 210417684. Its totient is φ = 70139226.

The previous prime is 140278447. The next prime is 140278469. The reversal of 140278454 is 454872041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454872041 = 13 ⋅34990157.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35069612 + ... + 35069615.

It is an arithmetic number, because the mean of its divisors is an integer number (52604421).

Almost surely, 2^140278454 is an apocalyptic number.

140278454 is a deficient number, since it is larger than the sum of its proper divisors (70139230).

140278454 is an equidigital number, since it uses as much as digits as its factorization.

140278454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70139229.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 140278454 is about 11843.9205502232. The cubic root of 140278454 is about 519.5934371420.

The spelling of 140278454 in words is "one hundred forty million, two hundred seventy-eight thousand, four hundred fifty-four".