1425164681 has 2 divisors, whose sum is σ = 1425164682. Its totient is φ = 1425164680.

The previous prime is 1425164677. The next prime is 1425164683. The reversal of 1425164681 is 1864615241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1293121600 + 132043081 = 35960^2 + 11491^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425164681 - 2² = 1425164677 is a prime.

It is a super-4 number, since 4×1425164681⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 1425164683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1425164683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712582340 + 712582341.

It is an arithmetic number, because the mean of its divisors is an integer number (712582341).

Almost surely, 2^1425164681 is an apocalyptic number.

It is an amenable number.

1425164681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425164681 is an equidigital number, since it uses as much as digits as its factorization.

1425164681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 1425164681 is about 37751.3533664689. The cubic root of 1425164681 is about 1125.3519046603.

The spelling of 1425164681 in words is "one billion, four hundred twenty-five million, one hundred sixty-four thousand, six hundred eighty-one".