1481551457 has 4 divisors (see below), whose sum is σ = 1481630640. Its totient is φ = 1481472276.

The previous prime is 1481551451. The next prime is 1481551493. The reversal of 1481551457 is 7541551841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7541551841 = 109 ⋅69188549.

It is a cyclic number.

It is not a de Polignac number, because 1481551457 - 2²⁸ = 1213116001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1481551451) 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, 5894 + ... + 54752.

It is an arithmetic number, because the mean of its divisors is an integer number (370407660).

Almost surely, 2^1481551457 is an apocalyptic number.

It is an amenable number.

1481551457 is a deficient number, since it is larger than the sum of its proper divisors (79183).

1481551457 is an equidigital number, since it uses as much as digits as its factorization.

1481551457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79182.

The product of its digits is 112000, while the sum is 41.

The square root of 1481551457 is about 38490.9269438916. The cubic root of 1481551457 is about 1140.0019126366.

The spelling of 1481551457 in words is "one billion, four hundred eighty-one million, five hundred fifty-one thousand, four hundred fifty-seven".