1356681241 has 4 divisors (see below), whose sum is σ = 1400445184. Its totient is φ = 1312917300.

The previous prime is 1356681181. The next prime is 1356681247. The reversal of 1356681241 is 1421866531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1421866531 = 4139 ⋅343529.

It is a cyclic number.

It is not a de Polignac number, because 1356681241 - 2¹⁹ = 1356156953 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 1356681241.

It is not an unprimeable number, because it can be changed into a prime (1356681247) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21881925 + ... + 21881986.

It is an arithmetic number, because the mean of its divisors is an integer number (350111296).

Almost surely, 2^1356681241 is an apocalyptic number.

It is an amenable number.

1356681241 is a deficient number, since it is larger than the sum of its proper divisors (43763943).

1356681241 is an equidigital number, since it uses as much as digits as its factorization.

1356681241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43763942.

The product of its digits is 34560, while the sum is 37.

The square root of 1356681241 is about 36833.1541006197. The cubic root of 1356681241 is about 1107.0297020575.

The spelling of 1356681241 in words is "one billion, three hundred fifty-six million, six hundred eighty-one thousand, two hundred forty-one".