1256340098 has 16 divisors (see below), whose sum is σ = 2031469440. Its totient is φ = 579278736.

The previous prime is 1256340049. The next prime is 1256340119. The reversal of 1256340098 is 8900436521.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3761 + ... + 50267.

It is an arithmetic number, because the mean of its divisors is an integer number (126966840).

Almost surely, 2^1256340098 is an apocalyptic number.

1256340098 is a deficient number, since it is larger than the sum of its proper divisors (775129342).

1256340098 is a wasteful number, since it uses less digits than its factorization.

1256340098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47561.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1256340098 is about 35444.8881786923. Note that the first 3 decimals coincide. The cubic root of 1256340098 is about 1079.0355181090.

The spelling of 1256340098 in words is "one billion, two hundred fifty-six million, three hundred forty thousand, ninety-eight".