1428245247 has 32 divisors (see below), whose sum is σ = 2242356480. Its totient is φ = 797195520.

The previous prime is 1428245233. The next prime is 1428245263. The reversal of 1428245247 is 7425428241.

It is not a de Polignac number, because 1428245247 - 2¹¹ = 1428243199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428245267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196779 + ... + 203907.

It is an arithmetic number, because the mean of its divisors is an integer number (70073640).

Almost surely, 2^1428245247 is an apocalyptic number.

1428245247 is a deficient number, since it is larger than the sum of its proper divisors (814111233).

1428245247 is a wasteful number, since it uses less digits than its factorization.

1428245247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7623.

The product of its digits is 143360, while the sum is 39.

The square root of 1428245247 is about 37792.1320779868. The cubic root of 1428245247 is about 1126.1621562814.

The spelling of 1428245247 in words is "one billion, four hundred twenty-eight million, two hundred forty-five thousand, two hundred forty-seven".