1425572657 has 4 divisors (see below), whose sum is σ = 1426057716. Its totient is φ = 1425087600.

The previous prime is 1425572653. The next prime is 1425572677. The reversal of 1425572657 is 7562755241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 258052096 + 1167520561 = 16064^2 + 34169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425572657 - 2² = 1425572653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425572653) 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, 238094 + ... + 244007.

It is an arithmetic number, because the mean of its divisors is an integer number (356514429).

Almost surely, 2^1425572657 is an apocalyptic number.

It is an amenable number.

1425572657 is a deficient number, since it is larger than the sum of its proper divisors (485059).

1425572657 is an equidigital number, since it uses as much as digits as its factorization.

1425572657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485058.

The product of its digits is 588000, while the sum is 44.

The square root of 1425572657 is about 37756.7564417284. The cubic root of 1425572657 is about 1125.4592776939.

The spelling of 1425572657 in words is "one billion, four hundred twenty-five million, five hundred seventy-two thousand, six hundred fifty-seven".