1298140723 has 32 divisors (see below), whose sum is σ = 1579087872. Its totient is φ = 1052620800.

The previous prime is 1298140721. The next prime is 1298140747. The reversal of 1298140723 is 3270418921.

It is not a de Polignac number, because 1298140723 - 2¹ = 1298140721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298140721) 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 31 ways as a sum of consecutive naturals, for example, 484678 + ... + 487348.

It is an arithmetic number, because the mean of its divisors is an integer number (49346496).

Almost surely, 2^1298140723 is an apocalyptic number.

1298140723 is a deficient number, since it is larger than the sum of its proper divisors (280947149).

1298140723 is a wasteful number, since it uses less digits than its factorization.

1298140723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1298140723 is about 36029.7199961365. The cubic root of 1298140723 is about 1090.8723266889.

The spelling of 1298140723 in words is "one billion, two hundred ninety-eight million, one hundred forty thousand, seven hundred twenty-three".