1572405121 has 8 divisors (see below), whose sum is σ = 1822345344. Its totient is φ = 1328792640.

The previous prime is 1572405053. The next prime is 1572405137. The reversal of 1572405121 is 1215042751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1572405121 - 2⁷ = 1572404993 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 1572405121.

It is not an unprimeable number, because it can be changed into a prime (1572405151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581400 + ... + 1582393.

It is an arithmetic number, because the mean of its divisors is an integer number (227793168).

Almost surely, 2^1572405121 is an apocalyptic number.

It is an amenable number.

1572405121 is a deficient number, since it is larger than the sum of its proper divisors (249940223).

1572405121 is an equidigital number, since it uses as much as digits as its factorization.

1572405121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163871.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1572405121 is about 39653.5637868780. The cubic root of 1572405121 is about 1162.8440718301.

Adding to 1572405121 its reverse (1215042751), we get a palindrome (2787447872).

The spelling of 1572405121 in words is "one billion, five hundred seventy-two million, four hundred five thousand, one hundred twenty-one".