1572100745 has 4 divisors (see below), whose sum is σ = 1886520900. Its totient is φ = 1257680592.

The previous prime is 1572100709. The next prime is 1572100763. The reversal of 1572100745 is 5470012751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5470012751 = 7 ⋅781430393.

It can be written as a sum of positive squares in 2 ways, for example, as 184389241 + 1387711504 = 13579^2 + 37252^2 .

It is a cyclic number.

It is not a de Polignac number, because 1572100745 - 2¹⁰ = 1572099721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157210070 + ... + 157210079.

It is an arithmetic number, because the mean of its divisors is an integer number (471630225).

Almost surely, 2^1572100745 is an apocalyptic number.

It is an amenable number.

1572100745 is a deficient number, since it is larger than the sum of its proper divisors (314420155).

1572100745 is an equidigital number, since it uses as much as digits as its factorization.

1572100745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314420154.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 1572100745 is about 39649.7256610938. The cubic root of 1572100745 is about 1162.7690350467.

The spelling of 1572100745 in words is "one billion, five hundred seventy-two million, one hundred thousand, seven hundred forty-five".