1421306660 has 24 divisors (see below), whose sum is σ = 2991885120. Its totient is φ = 567162464.

The previous prime is 1421306651. The next prime is 1421306669. The reversal of 1421306660 is 666031241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1421306651) and next prime (1421306669).

It is a super-2 number, since 2×1421306660² = 4040225243520711200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421306669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76424 + ... + 93183.

It is an arithmetic number, because the mean of its divisors is an integer number (124661880).

Almost surely, 2^1421306660 is an apocalyptic number.

1421306660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421306660 is an abundant number, since it is smaller than the sum of its proper divisors (1570578460).

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

1421306660 is a wasteful number, since it uses less digits than its factorization.

1421306660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170035 (or 170033 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1421306660 is about 37700.2209542597. The cubic root of 1421306660 is about 1124.3355180533.

The spelling of 1421306660 in words is "one billion, four hundred twenty-one million, three hundred six thousand, six hundred sixty".