1425571257 has 16 divisors (see below), whose sum is σ = 2163714048. Its totient is φ = 826417680.

The previous prime is 1425571253. The next prime is 1425571289. The reversal of 1425571257 is 7521755241.

It is not a de Polignac number, because 1425571257 - 2² = 1425571253 is a prime.

It is a super-3 number, since 3×1425571257³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1425571253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 938353 + ... + 939870.

It is an arithmetic number, because the mean of its divisors is an integer number (135232128).

Almost surely, 2^1425571257 is an apocalyptic number.

It is an amenable number.

1425571257 is a deficient number, since it is larger than the sum of its proper divisors (738142791).

1425571257 is a wasteful number, since it uses less digits than its factorization.

1425571257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878260.

The product of its digits is 98000, while the sum is 39.

The square root of 1425571257 is about 37756.7379019957. The cubic root of 1425571257 is about 1125.4589092704.

The spelling of 1425571257 in words is "one billion, four hundred twenty-five million, five hundred seventy-one thousand, two hundred fifty-seven".