1278233375 has 8 divisors (see below), whose sum is σ = 1595235408. Its totient is φ = 1022586600.

The previous prime is 1278233309. The next prime is 1278233387. The reversal of 1278233375 is 5733328721.

It is not a de Polignac number, because 1278233375 - 2¹⁴ = 1278216991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5112809 + ... + 5113058.

It is an arithmetic number, because the mean of its divisors is an integer number (199404426).

Almost surely, 2^1278233375 is an apocalyptic number.

1278233375 is a deficient number, since it is larger than the sum of its proper divisors (317002033).

1278233375 is an equidigital number, since it uses as much as digits as its factorization.

1278233375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10225882 (or 10225872 counting only the distinct ones).

The product of its digits is 211680, while the sum is 41.

The square root of 1278233375 is about 35752.3897802650. The cubic root of 1278233375 is about 1085.2673001941.

The spelling of 1278233375 in words is "one billion, two hundred seventy-eight million, two hundred thirty-three thousand, three hundred seventy-five".