1381442357 has 2 divisors, whose sum is σ = 1381442358. Its totient is φ = 1381442356.

The previous prime is 1381442351. The next prime is 1381442371. The reversal of 1381442357 is 7532441831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1339633201 + 41809156 = 36601^2 + 6466^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381442357 - 2¹⁰ = 1381441333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1381442357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381442351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690721178 + 690721179.

It is an arithmetic number, because the mean of its divisors is an integer number (690721179).

Almost surely, 2^1381442357 is an apocalyptic number.

It is an amenable number.

1381442357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381442357 is an equidigital number, since it uses as much as digits as its factorization.

1381442357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 1381442357 is about 37167.7596446167. The cubic root of 1381442357 is about 1113.7240277143.

The spelling of 1381442357 in words is "one billion, three hundred eighty-one million, four hundred forty-two thousand, three hundred fifty-seven".