1256540414 has 16 divisors (see below), whose sum is σ = 2100718800. Its totient is φ = 560191104.

The previous prime is 1256540399. The next prime is 1256540437. The reversal of 1256540414 is 4140456521.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 971909 + ... + 973200.

It is an arithmetic number, because the mean of its divisors is an integer number (131294925).

Almost surely, 2^1256540414 is an apocalyptic number.

1256540414 is a deficient number, since it is larger than the sum of its proper divisors (844178386).

1256540414 is a wasteful number, since it uses less digits than its factorization.

1256540414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945147.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1256540414 is about 35447.7138049832. The cubic root of 1256540414 is about 1079.0928636724.

Adding to 1256540414 its reverse (4140456521), we get a palindrome (5396996935).

The spelling of 1256540414 in words is "one billion, two hundred fifty-six million, five hundred forty thousand, four hundred fourteen".