1241278401890 has 8 divisors (see below), whose sum is σ = 2234301123420. Its totient is φ = 496511360752.

The previous prime is 1241278401871. The next prime is 1241278401899. The reversal of 1241278401890 is 981048721421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1202178480721 + 39099921169 = 1096439^2 + 197737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1241278401899) 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, 62063920085 + ... + 62063920104.

Almost surely, 2^{1241278401890} is an apocalyptic number.

1241278401890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1241278401890 is a deficient number, since it is larger than the sum of its proper divisors (993022721530).

1241278401890 is a wasteful number, since it uses less digits than its factorization.

1241278401890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124127840196.

The product of its (nonzero) digits is 258048, while the sum is 47.

The spelling of 1241278401890 in words is "one trillion, two hundred forty-one billion, two hundred seventy-eight million, four hundred one thousand, eight hundred ninety".