1423661205 has 16 divisors (see below), whose sum is σ = 2351337984. Its totient is φ = 734792640.

The previous prime is 1423661201. The next prime is 1423661227. The reversal of 1423661205 is 5021663241.

It is not a de Polignac number, because 1423661205 - 2² = 1423661201 is a prime.

It is a super-2 number, since 2×1423661205² = 4053622453244104050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423661201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530354 + ... + 1531283.

It is an arithmetic number, because the mean of its divisors is an integer number (146958624).

Almost surely, 2^1423661205 is an apocalyptic number.

1423661205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1423661205 is a deficient number, since it is larger than the sum of its proper divisors (927676779).

1423661205 is a wasteful number, since it uses less digits than its factorization.

1423661205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061676.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1423661205 is about 37731.4352364179. The cubic root of 1423661205 is about 1124.9560358128.

The spelling of 1423661205 in words is "one billion, four hundred twenty-three million, six hundred sixty-one thousand, two hundred five".