1421004173 has 4 divisors (see below), whose sum is σ = 1421133948. Its totient is φ = 1420874400.

The previous prime is 1421004131. The next prime is 1421004217. The reversal of 1421004173 is 3714001241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 505215529 + 915788644 = 22477^2 + 30262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421004173 - 2¹⁶ = 1420938637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421004113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46778 + ... + 70923.

It is an arithmetic number, because the mean of its divisors is an integer number (355283487).

Almost surely, 2^1421004173 is an apocalyptic number.

It is an amenable number.

1421004173 is a deficient number, since it is larger than the sum of its proper divisors (129775).

1421004173 is a wasteful number, since it uses less digits than its factorization.

1421004173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129774.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1421004173 is about 37696.2090003756. The cubic root of 1421004173 is about 1124.2557508416.

The spelling of 1421004173 in words is "one billion, four hundred twenty-one million, four thousand, one hundred seventy-three".