1572399401 has 8 divisors (see below), whose sum is σ = 1644899400. Its totient is φ = 1501118080.

The previous prime is 1572399373. The next prime is 1572399421. The reversal of 1572399401 is 1049932751.

It can be written as a sum of positive squares in 4 ways, for example, as 10569001 + 1561830400 = 3251^2 + 39520^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1572399401 - 2¹⁸ = 1572137257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1572399421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302030 + ... + 307191.

It is an arithmetic number, because the mean of its divisors is an integer number (205612425).

Almost surely, 2^1572399401 is an apocalyptic number.

It is an amenable number.

1572399401 is a deficient number, since it is larger than the sum of its proper divisors (72499999).

1572399401 is an equidigital number, since it uses as much as digits as its factorization.

1572399401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609339.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 1572399401 is about 39653.4916621475. The cubic root of 1572399401 is about 1162.8426617872.

The spelling of 1572399401 in words is "one billion, five hundred seventy-two million, three hundred ninety-nine thousand, four hundred one".