2170420145 has 8 divisors (see below), whose sum is σ = 2606630760. Its totient is φ = 1734918400.

The previous prime is 2170420129. The next prime is 2170420151. The reversal of 2170420145 is 5410240712.

It can be written as a sum of positive squares in 4 ways, for example, as 919241761 + 1251178384 = 30319^2 + 35372^2 .

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

It is not a de Polignac number, because 2170420145 - 2⁴ = 2170420129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170456 + ... + 182745.

It is an arithmetic number, because the mean of its divisors is an integer number (325828845).

Almost surely, 2^2170420145 is an apocalyptic number.

It is an amenable number.

2170420145 is a deficient number, since it is larger than the sum of its proper divisors (436210615).

2170420145 is a wasteful number, since it uses less digits than its factorization.

2170420145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354435.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2170420145 is about 46587.7681908030. The cubic root of 2170420145 is about 1294.7361397984.

Adding to 2170420145 its reverse (5410240712), we get a palindrome (7580660857).

The spelling of 2170420145 in words is "two billion, one hundred seventy million, four hundred twenty thousand, one hundred forty-five".