1405006427 has 4 divisors (see below), whose sum is σ = 1532734296. Its totient is φ = 1277278560.

The previous prime is 1405006411. The next prime is 1405006457. The reversal of 1405006427 is 7246005041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7246005041 = 11 ⋅658727731.

It is a cyclic number.

It is not a de Polignac number, because 1405006427 - 2⁴ = 1405006411 is a prime.

It is a super-2 number, since 2×1405006427² = 3948086119822612658, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405006427.

It is not an unprimeable number, because it can be changed into a prime (1405006457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63863918 + ... + 63863939.

It is an arithmetic number, because the mean of its divisors is an integer number (383183574).

Almost surely, 2^1405006427 is an apocalyptic number.

1405006427 is a deficient number, since it is larger than the sum of its proper divisors (127727869).

1405006427 is a wasteful number, since it uses less digits than its factorization.

1405006427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127727868.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 1405006427 is about 37483.4153593293. The cubic root of 1405006427 is about 1120.0208401203.

The spelling of 1405006427 in words is "one billion, four hundred five million, six thousand, four hundred twenty-seven".