1421550660 has 48 divisors (see below), whose sum is σ = 3983620032. Its totient is φ = 378768000.

The previous prime is 1421550643. The next prime is 1421550667. The reversal of 1421550660 is 660551241.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1421550667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68955 + ... + 87165.

It is an arithmetic number, because the mean of its divisors is an integer number (82992084).

Almost surely, 2^1421550660 is an apocalyptic number.

1421550660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421550660 is an abundant number, since it is smaller than the sum of its proper divisors (2562069372).

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

1421550660 is a wasteful number, since it uses less digits than its factorization.

1421550660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19524 (or 19522 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1421550660 is about 37703.4568706903. The cubic root of 1421550660 is about 1124.3998537280.

The spelling of 1421550660 in words is "one billion, four hundred twenty-one million, five hundred fifty thousand, six hundred sixty".