1257617341 has 4 divisors (see below), whose sum is σ = 1268746812. Its totient is φ = 1246487872.

The previous prime is 1257617327. The next prime is 1257617363. The reversal of 1257617341 is 1437167521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 614792025 + 642825316 = 24795^2 + 25354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257617341 - 2¹³ = 1257609149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1257617341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257617311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5564566 + ... + 5564791.

It is an arithmetic number, because the mean of its divisors is an integer number (317186703).

Almost surely, 2^1257617341 is an apocalyptic number.

It is an amenable number.

1257617341 is a deficient number, since it is larger than the sum of its proper divisors (11129471).

1257617341 is a wasteful number, since it uses less digits than its factorization.

1257617341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11129470.

The product of its digits is 35280, while the sum is 37.

The square root of 1257617341 is about 35462.9009106700. The cubic root of 1257617341 is about 1079.4010570762.

The spelling of 1257617341 in words is "one billion, two hundred fifty-seven million, six hundred seventeen thousand, three hundred forty-one".