1427205861 has 12 divisors (see below), whose sum is σ = 2090556000. Its totient is φ = 938069160.

The previous prime is 1427205823. The next prime is 1427205953. The reversal of 1427205861 is 1685027241.

1427205861 is a `hidden beast` number, since 1 + 4 + 2 + 72 + 0 + 586 + 1 = 666.

It is not a de Polignac number, because 1427205861 - 2¹⁹ = 1426681573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427205961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116111 + ... + 1117388.

It is an arithmetic number, because the mean of its divisors is an integer number (174213000).

Almost surely, 2^1427205861 is an apocalyptic number.

It is an amenable number.

1427205861 is a deficient number, since it is larger than the sum of its proper divisors (663350139).

1427205861 is a wasteful number, since it uses less digits than its factorization.

1427205861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233576 (or 2233573 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1427205861 is about 37778.3782208818. The cubic root of 1427205861 is about 1125.8889069360. Note that the first 3 decimals are identical.

The spelling of 1427205861 in words is "one billion, four hundred twenty-seven million, two hundred five thousand, eight hundred sixty-one".