1421620410 has 64 divisors (see below), whose sum is σ = 4128682752. Its totient is φ = 305826816.

The previous prime is 1421620391. The next prime is 1421620411. The reversal of 1421620410 is 140261241.

It is a happy number.

1421620410 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1421620411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195537 + ... + 202676.

It is an arithmetic number, because the mean of its divisors is an integer number (64510668).

Almost surely, 2^1421620410 is an apocalyptic number.

1421620410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421620410 is an abundant number, since it is smaller than the sum of its proper divisors (2707062342).

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

1421620410 is a wasteful number, since it uses less digits than its factorization.

1421620410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398247.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1421620410 is about 37704.3818408418. The cubic root of 1421620410 is about 1124.4182434132.

Adding to 1421620410 its reverse (140261241), we get a palindrome (1561881651).

The spelling of 1421620410 in words is "one billion, four hundred twenty-one million, six hundred twenty thousand, four hundred ten".