140721511 has 8 divisors (see below), whose sum is σ = 161659424. Its totient is φ = 119992320.

The previous prime is 140721509. The next prime is 140721517. The reversal of 140721511 is 115127041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140721511 - 2¹ = 140721509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140721517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50730 + ... + 53431.

It is an arithmetic number, because the mean of its divisors is an integer number (20207428).

Almost surely, 2^140721511 is an apocalyptic number.

140721511 is a deficient number, since it is larger than the sum of its proper divisors (20937913).

140721511 is a wasteful number, since it uses less digits than its factorization.

140721511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104361.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 140721511 is about 11862.6097887438. The cubic root of 140721511 is about 520.1398920961.

Adding to 140721511 its reverse (115127041), we get a palindrome (255848552).

The spelling of 140721511 in words is "one hundred forty million, seven hundred twenty-one thousand, five hundred eleven".