1378942071 has 16 divisors (see below), whose sum is σ = 2022150144. Its totient is φ = 830523744.

The previous prime is 1378942057. The next prime is 1378942079. The reversal of 1378942071 is 1702498731.

It is not a de Polignac number, because 1378942071 - 2¹³ = 1378933879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378942079) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 374311 + ... + 377976.

It is an arithmetic number, because the mean of its divisors is an integer number (126384384).

Almost surely, 2^1378942071 is an apocalyptic number.

1378942071 is a deficient number, since it is larger than the sum of its proper divisors (643208073).

1378942071 is a wasteful number, since it uses less digits than its factorization.

1378942071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752350.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1378942071 is about 37134.1092662797. The cubic root of 1378942071 is about 1113.0517086108.

The spelling of 1378942071 in words is "one billion, three hundred seventy-eight million, nine hundred forty-two thousand, seventy-one".