1423271561 has 4 divisors (see below), whose sum is σ = 1423386132. Its totient is φ = 1423156992.

The previous prime is 1423271543. The next prime is 1423271587. The reversal of 1423271561 is 1651723241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1651723241 = 7 ⋅235960463.

It can be written as a sum of positive squares in 2 ways, for example, as 1173473536 + 249798025 = 34256^2 + 15805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423271561 - 2¹⁴ = 1423255177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423271261) 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, 36020 + ... + 64373.

It is an arithmetic number, because the mean of its divisors is an integer number (355846533).

Almost surely, 2^1423271561 is an apocalyptic number.

It is an amenable number.

1423271561 is a deficient number, since it is larger than the sum of its proper divisors (114571).

1423271561 is a wasteful number, since it uses less digits than its factorization.

1423271561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114570.

The product of its digits is 10080, while the sum is 32.

The square root of 1423271561 is about 37726.2714961338. The cubic root of 1423271561 is about 1124.8533961390.

The spelling of 1423271561 in words is "one billion, four hundred twenty-three million, two hundred seventy-one thousand, five hundred sixty-one".