1421605290 has 32 divisors (see below), whose sum is σ = 3899260800. Its totient is φ = 324938304.

The previous prime is 1421605261. The next prime is 1421605307. The reversal of 1421605290 is 925061241.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3384565 + ... + 3384984.

It is an arithmetic number, because the mean of its divisors is an integer number (121851900).

Almost surely, 2^1421605290 is an apocalyptic number.

1421605290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421605290 is an abundant number, since it is smaller than the sum of its proper divisors (2477655510).

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

1421605290 is a wasteful number, since it uses less digits than its factorization.

1421605290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6769566.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1421605290 is about 37704.1813331095. The cubic root of 1421605290 is about 1124.4142570551.

The spelling of 1421605290 in words is "one billion, four hundred twenty-one million, six hundred five thousand, two hundred ninety".