1278458152 has 16 divisors (see below), whose sum is σ = 2397556800. Its totient is φ = 639109680.

The previous prime is 1278458131. The next prime is 1278458173. The reversal of 1278458152 is 2518548721.

It is an interprime number because it is at equal distance from previous prime (1278458131) and next prime (1278458173).

It is a junction number, because it is equal to n+sod(n) for n = 1278458099 and 1278458108.

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, 44499 + ... + 67357.

It is an arithmetic number, because the mean of its divisors is an integer number (149847300).

Almost surely, 2^1278458152 is an apocalyptic number.

It is an amenable number.

1278458152 is a deficient number, since it is larger than the sum of its proper divisors (1119098648).

1278458152 is a wasteful number, since it uses less digits than its factorization.

1278458152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29856 (or 29852 counting only the distinct ones).

The product of its digits is 179200, while the sum is 43.

The square root of 1278458152 is about 35755.5331662108. The cubic root of 1278458152 is about 1085.3309111213.

The spelling of 1278458152 in words is "one billion, two hundred seventy-eight million, four hundred fifty-eight thousand, one hundred fifty-two".