1201560650 has 24 divisors (see below), whose sum is σ = 2235844620. Its totient is φ = 480421760.

The previous prime is 1201560649. The next prime is 1201560671. The reversal of 1201560650 is 560651021.

1201560650 = 10001² + 10002² + ... + 10012².

It can be written as a sum of positive squares in 6 ways, for example, as 224310529 + 977250121 = 14977^2 + 31261^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186686 + ... + 193014.

Almost surely, 2^1201560650 is an apocalyptic number.

1201560650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201560650 is a deficient number, since it is larger than the sum of its proper divisors (1034283970).

1201560650 is a wasteful number, since it uses less digits than its factorization.

1201560650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10138 (or 10133 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1201560650 is about 34663.5348745623. The cubic root of 1201560650 is about 1063.1190468657.

The spelling of 1201560650 in words is "one billion, two hundred one million, five hundred sixty thousand, six hundred fifty".