1200661572 has 48 divisors (see below), whose sum is σ = 3058719552. Its totient is φ = 363540480.

The previous prime is 1200661549. The next prime is 1200661603. The reversal of 1200661572 is 2751660021.

It is a super-2 number, since 2×1200661572² = 2883176420955022368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202068 + ... + 207924.

It is an arithmetic number, because the mean of its divisors is an integer number (63723324).

Almost surely, 2^1200661572 is an apocalyptic number.

1200661572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200661572 is an abundant number, since it is smaller than the sum of its proper divisors (1858057980).

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

1200661572 is a wasteful number, since it uses less digits than its factorization.

1200661572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428 (or 7426 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1200661572 is about 34650.5638049369. The cubic root of 1200661572 is about 1062.8538180714.

The spelling of 1200661572 in words is "one billion, two hundred million, six hundred sixty-one thousand, five hundred seventy-two".