1378505242 has 8 divisors (see below), whose sum is σ = 2073616596. Its totient is φ = 687299712.

The previous prime is 1378505221. The next prime is 1378505279. The reversal of 1378505242 is 2425058731.

It can be written as a sum of positive squares in 2 ways, for example, as 1163560321 + 214944921 = 34111^2 + 14661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×1378505242⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975573 + ... + 976984.

Almost surely, 2^1378505242 is an apocalyptic number.

1378505242 is a deficient number, since it is larger than the sum of its proper divisors (695111354).

1378505242 is a wasteful number, since it uses less digits than its factorization.

1378505242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952912.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 1378505242 is about 37128.2270247315. The cubic root of 1378505242 is about 1112.9341632775.

The spelling of 1378505242 in words is "one billion, three hundred seventy-eight million, five hundred five thousand, two hundred forty-two".