140905961 has 16 divisors (see below), whose sum is σ = 163918080. Its totient is φ = 118628160.

The previous prime is 140905949. The next prime is 140905967. The reversal of 140905961 is 169509041.

It is not a de Polignac number, because 140905961 - 2¹⁴ = 140889577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140905967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252695 + ... + 253251.

It is an arithmetic number, because the mean of its divisors is an integer number (10244880).

Almost surely, 2^140905961 is an apocalyptic number.

It is an amenable number.

140905961 is a deficient number, since it is larger than the sum of its proper divisors (23012119).

140905961 is an equidigital number, since it uses as much as digits as its factorization.

140905961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 140905961 is about 11870.3816703592. The cubic root of 140905961 is about 520.3670497765.

The spelling of 140905961 in words is "one hundred forty million, nine hundred five thousand, nine hundred sixty-one".