601221540 has 48 divisors (see below), whose sum is σ = 1724486400. Its totient is φ = 156414720.

The previous prime is 601221497. The next prime is 601221563. The reversal of 601221540 is 45122106.

It is a super-2 number, since 2×601221540² = 722934680319943200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119740 + ... + 124659.

It is an arithmetic number, because the mean of its divisors is an integer number (35926800).

Almost surely, 2^601221540 is an apocalyptic number.

601221540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

601221540 is an abundant number, since it is smaller than the sum of its proper divisors (1123264860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

601221540 is a wasteful number, since it uses less digits than its factorization.

601221540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244452 (or 244450 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 601221540 is about 24519.8193304926. The cubic root of 601221540 is about 844.0046588244.

Adding to 601221540 its reverse (45122106), we get a palindrome (646343646).

The spelling of 601221540 in words is "six hundred one million, two hundred twenty-one thousand, five hundred forty".