1240489994 has 4 divisors (see below), whose sum is σ = 1860734994. Its totient is φ = 620244996.

The previous prime is 1240489967. The next prime is 1240490011. The reversal of 1240489994 is 4999840421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4999840421 = 599 ⋅8346979.

It can be written as a sum of positive squares in only one way, i.e., 1199721769 + 40768225 = 34637^2 + 6385^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 310122497 + ... + 310122500.

Almost surely, 2^1240489994 is an apocalyptic number.

1240489994 is a deficient number, since it is larger than the sum of its proper divisors (620245000).

1240489994 is an equidigital number, since it uses as much as digits as its factorization.

1240489994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620244999.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 1240489994 is about 35220.5904834090. The cubic root of 1240489994 is about 1074.4785627617.

The spelling of 1240489994 in words is "one billion, two hundred forty million, four hundred eighty-nine thousand, nine hundred ninety-four".