1478461139 has 4 divisors (see below), whose sum is σ = 1478552400. Its totient is φ = 1478369880.

The previous prime is 1478461123. The next prime is 1478461157. The reversal of 1478461139 is 9311648741.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9311648741 = 1483 ⋅6278927.

It is a cyclic number.

It is not a de Polignac number, because 1478461139 - 2⁴ = 1478461123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1478461139.

It is not an unprimeable number, because it can be changed into a prime (1478461109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14039 + ... + 56160.

It is an arithmetic number, because the mean of its divisors is an integer number (369638100).

Almost surely, 2^1478461139 is an apocalyptic number.

1478461139 is a deficient number, since it is larger than the sum of its proper divisors (91261).

1478461139 is an equidigital number, since it uses as much as digits as its factorization.

1478461139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91260.

The product of its digits is 145152, while the sum is 44.

The square root of 1478461139 is about 38450.7625281996. The cubic root of 1478461139 is about 1139.2087304318.

The spelling of 1478461139 in words is "one billion, four hundred seventy-eight million, four hundred sixty-one thousand, one hundred thirty-nine".