140420515 has 4 divisors (see below), whose sum is σ = 168504624. Its totient is φ = 112336408.

The previous prime is 140420509. The next prime is 140420563. The reversal of 140420515 is 515024041.

140420515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515024041 = 7 ⋅73574863.

It is a cyclic number.

It is not a de Polignac number, because 140420515 - 2¹³ = 140412323 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14042047 + ... + 14042056.

It is an arithmetic number, because the mean of its divisors is an integer number (42126156).

Almost surely, 2^140420515 is an apocalyptic number.

140420515 is a deficient number, since it is larger than the sum of its proper divisors (28084109).

140420515 is an equidigital number, since it uses as much as digits as its factorization.

140420515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28084108.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 140420515 is about 11849.9162444297. The cubic root of 140420515 is about 519.7687766373.

Adding to 140420515 its reverse (515024041), we get a palindrome (655444556).

The spelling of 140420515 in words is "one hundred forty million, four hundred twenty thousand, five hundred fifteen".