1425428257 has 8 divisors (see below), whose sum is σ = 1646484192. Its totient is φ = 1219617600.

The previous prime is 1425428231. The next prime is 1425428261. The reversal of 1425428257 is 7528245241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1425428257 - 2¹¹ = 1425426209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425428287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3811119 + ... + 3811492.

It is an arithmetic number, because the mean of its divisors is an integer number (205810524).

Almost surely, 2^1425428257 is an apocalyptic number.

1425428257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1425428257 is a deficient number, since it is larger than the sum of its proper divisors (221055935).

1425428257 is a wasteful number, since it uses less digits than its factorization.

1425428257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7622639.

The product of its digits is 179200, while the sum is 40.

The square root of 1425428257 is about 37754.8441527706. The cubic root of 1425428257 is about 1125.4212761684.

The spelling of 1425428257 in words is "one billion, four hundred twenty-five million, four hundred twenty-eight thousand, two hundred fifty-seven".