642480145 has 16 divisors (see below), whose sum is σ = 780654672. Its totient is φ = 507566080.

The previous prime is 642480131. The next prime is 642480169. The reversal of 642480145 is 541084246.

It can be written as a sum of positive squares in 8 ways, for example, as 1985281 + 640494864 = 1409^2 + 25308^2 .

It is not a de Polignac number, because 642480145 - 2¹¹ = 642478097 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 642480145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163605 + ... + 167485.

It is an arithmetic number, because the mean of its divisors is an integer number (48790917).

Almost surely, 2^642480145 is an apocalyptic number.

It is an amenable number.

642480145 is a deficient number, since it is larger than the sum of its proper divisors (138174527).

642480145 is a wasteful number, since it uses less digits than its factorization.

642480145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 642480145 is about 25347.1920535589. The cubic root of 642480145 is about 862.8856308182.

The spelling of 642480145 in words is "six hundred forty-two million, four hundred eighty thousand, one hundred forty-five".