140920641 has 15 divisors (see below), whose sum is σ = 210670801. Its totient is φ = 93875868.

The previous prime is 140920621. The next prime is 140920669. The reversal of 140920641 is 146029041.

The square root of 140920641 is 11871.

It is a perfect power (a square), and thus also a powerful number.

140920641 is a `hidden beast` number, since 14 + 0 + 9 + 2 + 0 + 641 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-140920641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140920621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 106180 + ... + 107498.

Almost surely, 2^140920641 is an apocalyptic number.

140920641 is the 11871-st square number.

140920641 is the 5936-th centered octagonal number.

It is an amenable number.

140920641 is a deficient number, since it is larger than the sum of its proper divisors (69750160).

140920641 is an frugal number, since it uses more digits than its factorization.

140920641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The cubic root of 140920641 is about 520.3851202754.

Adding to 140920641 its reverse (146029041), we get a palindrome (286949682).

The spelling of 140920641 in words is "one hundred forty million, nine hundred twenty thousand, six hundred forty-one".