120261603 has 32 divisors (see below), whose sum is σ = 200471040. Its totient is φ = 62300160.

The previous prime is 120261601. The next prime is 120261613. The reversal of 120261603 is 306162021.

It is a happy number.

It is not a de Polignac number, because 120261603 - 2¹ = 120261601 is a prime.

It is a super-2 number, since 2×120261603² = 28925706312259218, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 120261603.

It is not an unprimeable number, because it can be changed into a prime (120261601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156003 + ... + 156771.

It is an arithmetic number, because the mean of its divisors is an integer number (6264720).

Almost surely, 2^120261603 is an apocalyptic number.

120261603 is a deficient number, since it is larger than the sum of its proper divisors (80209437).

120261603 is a wasteful number, since it uses less digits than its factorization.

120261603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 120261603 is about 10966.3851382304. The cubic root of 120261603 is about 493.6005816530.

The spelling of 120261603 in words is "one hundred twenty million, two hundred sixty-one thousand, six hundred three".