1378554242 has 16 divisors (see below), whose sum is σ = 2357889912. Its totient is φ = 598828800.

The previous prime is 1378554241. The next prime is 1378554263. The reversal of 1378554242 is 2424558731.

It can be written as a sum of positive squares in 4 ways, for example, as 1335244681 + 43309561 = 36541^2 + 6581^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1378554242.

It is not an unprimeable number, because it can be changed into a prime (1378554241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559009 + ... + 1559892.

Almost surely, 2^1378554242 is an apocalyptic number.

1378554242 is a deficient number, since it is larger than the sum of its proper divisors (979335670).

1378554242 is a wasteful number, since it uses less digits than its factorization.

1378554242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118933.

The product of its digits is 268800, while the sum is 41.

The square root of 1378554242 is about 37128.8868941691. The cubic root of 1378554242 is about 1112.9473498138.

The spelling of 1378554242 in words is "one billion, three hundred seventy-eight million, five hundred fifty-four thousand, two hundred forty-two".