1421004520 has 32 divisors (see below), whose sum is σ = 3443204520. Its totient is φ = 524678400.

The previous prime is 1421004467. The next prime is 1421004587. The reversal of 1421004520 is 254001241.

It can be written as a sum of positive squares in 4 ways, for example, as 1274061636 + 146942884 = 35694^2 + 12122^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365831 + ... + 1366870.

Almost surely, 2^1421004520 is an apocalyptic number.

1421004520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421004520 is an abundant number, since it is smaller than the sum of its proper divisors (2022200000).

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

1421004520 is a wasteful number, since it uses less digits than its factorization.

1421004520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732725 (or 2732721 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1421004520 is about 37696.2136029602. The cubic root of 1421004520 is about 1124.2558423536.

Adding to 1421004520 its reverse (254001241), we get a palindrome (1675005761).

The spelling of 1421004520 in words is "one billion, four hundred twenty-one million, four thousand, five hundred twenty".