140455451 has 4 divisors (see below), whose sum is σ = 144986304. Its totient is φ = 135924600.

The previous prime is 140455423. The next prime is 140455453. The reversal of 140455451 is 154554041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154554041 = 6971 ⋅22171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140455451 is a prime.

It is a super-2 number, since 2×140455451² = 39455467431226802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140455453) 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, 2265380 + ... + 2265441.

It is an arithmetic number, because the mean of its divisors is an integer number (36246576).

Almost surely, 2^140455451 is an apocalyptic number.

140455451 is a deficient number, since it is larger than the sum of its proper divisors (4530853).

140455451 is an equidigital number, since it uses as much as digits as its factorization.

140455451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4530852.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 140455451 is about 11851.3902559995. The cubic root of 140455451 is about 519.8118784501.

The spelling of 140455451 in words is "one hundred forty million, four hundred fifty-five thousand, four hundred fifty-one".