1421521130 has 64 divisors (see below), whose sum is σ = 2878791840. Its totient is φ = 502677504.

The previous prime is 1421521069. The next prime is 1421521139. The reversal of 1421521130 is 311251241.

It can be written as a sum of positive squares in 16 ways, for example, as 1035359329 + 386161801 = 32177^2 + 19651^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421521139) 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, 178514 + ... + 186306.

Almost surely, 2^1421521130 is an apocalyptic number.

1421521130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421521130 is an abundant number, since it is smaller than the sum of its proper divisors (1457270710).

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

1421521130 is a wasteful number, since it uses less digits than its factorization.

1421521130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7883.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1421521130 is about 37703.0652600024. The cubic root of 1421521130 is about 1124.3920679210.

Adding to 1421521130 its reverse (311251241), we get a palindrome (1732772371).

The spelling of 1421521130 in words is "one billion, four hundred twenty-one million, five hundred twenty-one thousand, one hundred thirty".