140720642 has 8 divisors (see below), whose sum is σ = 211152396. Its totient is φ = 70336512.

The previous prime is 140720633. The next prime is 140720663. The reversal of 140720642 is 246027041.

It can be written as a sum of positive squares in 2 ways, for example, as 119661721 + 21058921 = 10939^2 + 4589^2 .

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

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, 3263 + ... + 17090.

Almost surely, 2^140720642 is an apocalyptic number.

140720642 is a deficient number, since it is larger than the sum of its proper divisors (70431754).

140720642 is a wasteful number, since it uses less digits than its factorization.

140720642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23812.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 140720642 is about 11862.5731609967. The cubic root of 140720642 is about 520.1388214176.

Adding to 140720642 its reverse (246027041), we get a palindrome (386747683).

The spelling of 140720642 in words is "one hundred forty million, seven hundred twenty thousand, six hundred forty-two".