1425405391 has 4 divisors (see below), whose sum is σ = 1438019712. Its totient is φ = 1412791072.

The previous prime is 1425405349. The next prime is 1425405407. The reversal of 1425405391 is 1935045241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1935045241 = 103 ⋅18786847.

It is a cyclic number.

It is not a de Polignac number, because 1425405391 - 2⁷ = 1425405263 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 (1425415391) 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, 6306991 + ... + 6307216.

It is an arithmetic number, because the mean of its divisors is an integer number (359504928).

Almost surely, 2^1425405391 is an apocalyptic number.

1425405391 is a deficient number, since it is larger than the sum of its proper divisors (12614321).

1425405391 is a wasteful number, since it uses less digits than its factorization.

1425405391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12614320.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1425405391 is about 37754.5413294878. The cubic root of 1425405391 is about 1125.4152583230.

The spelling of 1425405391 in words is "one billion, four hundred twenty-five million, four hundred five thousand, three hundred ninety-one".