645060542 has 16 divisors (see below), whose sum is σ = 1106307072. Its totient is φ = 276332280.

The previous prime is 645060541. The next prime is 645060589. The reversal of 645060542 is 245060546.

It is a super-2 number, since 2×645060542² = 832206205690667528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645060499 and 645060508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645060541) 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, 27383 + ... + 45165.

It is an arithmetic number, because the mean of its divisors is an integer number (69144192).

Almost surely, 2^645060542 is an apocalyptic number.

645060542 is a deficient number, since it is larger than the sum of its proper divisors (461246530).

645060542 is a wasteful number, since it uses less digits than its factorization.

645060542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20383.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 645060542 is about 25398.0420898935. The cubic root of 645060542 is about 864.0392920160.

The spelling of 645060542 in words is "six hundred forty-five million, sixty thousand, five hundred forty-two".