140342451 has 4 divisors (see below), whose sum is σ = 187123272. Its totient is φ = 93561632.

The previous prime is 140342437. The next prime is 140342479. The reversal of 140342451 is 154243041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154243041 = 3 ⋅51414347.

It is a cyclic number.

It is not a de Polignac number, because 140342451 - 2⁹ = 140341939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140342401) 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, 23390406 + ... + 23390411.

It is an arithmetic number, because the mean of its divisors is an integer number (46780818).

Almost surely, 2^140342451 is an apocalyptic number.

140342451 is a deficient number, since it is larger than the sum of its proper divisors (46780821).

140342451 is an equidigital number, since it uses as much as digits as its factorization.

140342451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46780820.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 140342451 is about 11846.6219235696. The cubic root of 140342451 is about 519.6724404025.

Adding to 140342451 its reverse (154243041), we get a palindrome (294585492).

The spelling of 140342451 in words is "one hundred forty million, three hundred forty-two thousand, four hundred fifty-one".