2145436123 has 8 divisors (see below), whose sum is σ = 2151743616. Its totient is φ = 2139139200.

The previous prime is 2145436121. The next prime is 2145436133. The reversal of 2145436123 is 3216345412.

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 2145436123 - 2¹ = 2145436121 is a prime.

It is a super-2 number, since 2×2145436123² = 9205792315746542258, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145436121) 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, 568563 + ... + 572323.

It is an arithmetic number, because the mean of its divisors is an integer number (268967952).

Almost surely, 2^2145436123 is an apocalyptic number.

2145436123 is a deficient number, since it is larger than the sum of its proper divisors (6307493).

2145436123 is an equidigital number, since it uses as much as digits as its factorization.

2145436123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285.

The product of its digits is 17280, while the sum is 31.

The square root of 2145436123 is about 46318.8527815619. The cubic root of 2145436123 is about 1289.7489892797.

The spelling of 2145436123 in words is "two billion, one hundred forty-five million, four hundred thirty-six thousand, one hundred twenty-three".