1421667025 has 9 divisors (see below), whose sum is σ = 1763100913. Its totient is φ = 1137182800.

The previous prime is 1421666969. The next prime is 1421667089. The reversal of 1421667025 is 5207661241.

The square root of 1421667025 is 37705.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 431683729 + 989983296 = 20777^2 + 31464^2 .

It is not a de Polignac number, because 1421667025 - 2¹⁵ = 1421634257 is a prime.

It is a super-2 number, since 2×1421667025² = 4042274259944701250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 184755 + ... + 192295.

Almost surely, 2^1421667025 is an apocalyptic number.

1421667025 is the 37705-th square number.

1421667025 is the 18853-rd centered octagonal number.

It is an amenable number.

1421667025 is a deficient number, since it is larger than the sum of its proper divisors (341433888).

1421667025 is an frugal number, since it uses more digits than its factorization.

1421667025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15092 (or 7546 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The cubic root of 1421667025 is about 1124.4305331879.

The spelling of 1421667025 in words is "one billion, four hundred twenty-one million, six hundred sixty-seven thousand, twenty-five".