1572448047 has 4 divisors (see below), whose sum is σ = 2096597400. Its totient is φ = 1048298696.

The previous prime is 1572448039. The next prime is 1572448049. The reversal of 1572448047 is 7408442751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7408442751 = 3 ⋅2469480917.

It is a cyclic number.

It is not a de Polignac number, because 1572448047 - 2³ = 1572448039 is a prime.

It is a super-2 number, since 2×1572448047² = 4945185721028228418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1572448049) 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, 262074672 + ... + 262074677.

It is an arithmetic number, because the mean of its divisors is an integer number (524149350).

Almost surely, 2^1572448047 is an apocalyptic number.

1572448047 is a deficient number, since it is larger than the sum of its proper divisors (524149353).

1572448047 is an equidigital number, since it uses as much as digits as its factorization.

1572448047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524149352.

The product of its (nonzero) digits is 250880, while the sum is 42.

The square root of 1572448047 is about 39654.1050460101. The cubic root of 1572448047 is about 1162.8546534523.

The spelling of 1572448047 in words is "one billion, five hundred seventy-two million, four hundred forty-eight thousand, forty-seven".