1425423905 has 32 divisors (see below), whose sum is σ = 1848015648. Its totient is φ = 1051545600.

The previous prime is 1425423889. The next prime is 1425423907. The reversal of 1425423905 is 5093245241.

It can be written as a sum of positive squares in 16 ways, for example, as 1151719969 + 273703936 = 33937^2 + 16544^2 .

It is not a de Polignac number, because 1425423905 - 2⁴ = 1425423889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425423907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2182559 + ... + 2183211.

It is an arithmetic number, because the mean of its divisors is an integer number (57750489).

Almost surely, 2^1425423905 is an apocalyptic number.

It is an amenable number.

1425423905 is a deficient number, since it is larger than the sum of its proper divisors (422591743).

1425423905 is a wasteful number, since it uses less digits than its factorization.

1425423905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1425423905 is about 37754.7865177384. The cubic root of 1425423905 is about 1125.4201308194.

The spelling of 1425423905 in words is "one billion, four hundred twenty-five million, four hundred twenty-three thousand, nine hundred five".