140261129 has 4 divisors (see below), whose sum is σ = 141101184. Its totient is φ = 139421076.

The previous prime is 140261089. The next prime is 140261167. The reversal of 140261129 is 921162041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140261129 - 2¹⁶ = 140195593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140261098 and 140261107.

It is not an unprimeable number, because it can be changed into a prime (140261179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419777 + ... + 420110.

It is an arithmetic number, because the mean of its divisors is an integer number (35275296).

Almost surely, 2^140261129 is an apocalyptic number.

It is an amenable number.

140261129 is a deficient number, since it is larger than the sum of its proper divisors (840055).

140261129 is an equidigital number, since it uses as much as digits as its factorization.

140261129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840054.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 140261129 is about 11843.1891397545. The cubic root of 140261129 is about 519.5720455772.

The spelling of 140261129 in words is "one hundred forty million, two hundred sixty-one thousand, one hundred twenty-nine".