1378467451 has 4 divisors (see below), whose sum is σ = 1390666392. Its totient is φ = 1366268512.

The previous prime is 1378467413. The next prime is 1378467473. The reversal of 1378467451 is 1547648731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1547648731 = 5507 ⋅281033.

It is a cyclic number.

It is not a de Polignac number, because 1378467451 - 2¹³ = 1378459259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378467401) 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, 6099301 + ... + 6099526.

It is an arithmetic number, because the mean of its divisors is an integer number (347666598).

Almost surely, 2^1378467451 is an apocalyptic number.

1378467451 is a deficient number, since it is larger than the sum of its proper divisors (12198941).

1378467451 is a wasteful number, since it uses less digits than its factorization.

1378467451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12198940.

The product of its digits is 564480, while the sum is 46.

The square root of 1378467451 is about 37127.7180957839. The cubic root of 1378467451 is about 1112.9239930153.

The spelling of 1378467451 in words is "one billion, three hundred seventy-eight million, four hundred sixty-seven thousand, four hundred fifty-one".