1940245259 has 4 divisors (see below), whose sum is σ = 1948363680. Its totient is φ = 1932126840.

The previous prime is 1940245213. The next prime is 1940245277. The reversal of 1940245259 is 9525420491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9525420491 = 23 ⋅414148717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1940245259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940245759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4058852 + ... + 4059329.

It is an arithmetic number, because the mean of its divisors is an integer number (487090920).

Almost surely, 2^1940245259 is an apocalyptic number.

1940245259 is a deficient number, since it is larger than the sum of its proper divisors (8118421).

1940245259 is an equidigital number, since it uses as much as digits as its factorization.

1940245259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118420.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 1940245259 is about 44048.2151624785. The cubic root of 1940245259 is about 1247.2462599072.

The spelling of 1940245259 in words is "one billion, nine hundred forty million, two hundred forty-five thousand, two hundred fifty-nine".