1421646621 has 8 divisors (see below), whose sum is σ = 1901625024. Its totient is φ = 944716320.

The previous prime is 1421646599. The next prime is 1421646649. The reversal of 1421646621 is 1266461241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1421646621 - 2¹³ = 1421638429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421686621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760936 + ... + 762801.

It is an arithmetic number, because the mean of its divisors is an integer number (237703128).

Almost surely, 2^1421646621 is an apocalyptic number.

It is an amenable number.

1421646621 is a deficient number, since it is larger than the sum of its proper divisors (479978403).

1421646621 is a wasteful number, since it uses less digits than its factorization.

1421646621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524051.

The product of its digits is 13824, while the sum is 33.

The square root of 1421646621 is about 37704.7294248348. The cubic root of 1421646621 is about 1124.4251538245.

It can be divided in two parts, 142164 and 6621, that added together give a triangular number (148785 = T₅₄₅).

The spelling of 1421646621 in words is "one billion, four hundred twenty-one million, six hundred forty-six thousand, six hundred twenty-one".