1256940741 has 16 divisors (see below), whose sum is σ = 1917691904. Its totient is φ = 717369264.

The previous prime is 1256940691. The next prime is 1256940793. The reversal of 1256940741 is 1470496521.

It is not a de Polignac number, because 1256940741 - 2¹⁵ = 1256907973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1256940741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256940341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19081 + ... + 53646.

It is an arithmetic number, because the mean of its divisors is an integer number (119855744).

Almost surely, 2^1256940741 is an apocalyptic number.

It is an amenable number.

1256940741 is a deficient number, since it is larger than the sum of its proper divisors (660751163).

1256940741 is an equidigital number, since it uses as much as digits as its factorization.

1256940741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73560.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1256940741 is about 35453.3600805340. The cubic root of 1256940741 is about 1079.2074492269.

The spelling of 1256940741 in words is "one billion, two hundred fifty-six million, nine hundred forty thousand, seven hundred forty-one".