1421240173 has 4 divisors (see below), whose sum is σ = 1483033248. Its totient is φ = 1359447100.

The previous prime is 1421240089. The next prime is 1421240179. The reversal of 1421240173 is 3710421241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3710421241 = 17 ⋅218260073.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421240173 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 (1421240179) 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, 30896503 + ... + 30896548.

It is an arithmetic number, because the mean of its divisors is an integer number (370758312).

Almost surely, 2^1421240173 is an apocalyptic number.

It is an amenable number.

1421240173 is a deficient number, since it is larger than the sum of its proper divisors (61793075).

1421240173 is an equidigital number, since it uses as much as digits as its factorization.

1421240173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61793074.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1421240173 is about 37699.3391586643. The cubic root of 1421240173 is about 1124.3179860964.

The spelling of 1421240173 in words is "one billion, four hundred twenty-one million, two hundred forty thousand, one hundred seventy-three".