1247255471 has 16 divisors (see below), whose sum is σ = 1580517888. Its totient is φ = 955951200.

The previous prime is 1247255453. The next prime is 1247255491. The reversal of 1247255471 is 1745527421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1247255471 - 2⁶ = 1247255407 is a prime.

It is a super-3 number, since 3×1247255471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247255411) 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, 128075 + ... + 137468.

It is an arithmetic number, because the mean of its divisors is an integer number (98782368).

Almost surely, 2^1247255471 is an apocalyptic number.

1247255471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1247255471 is a deficient number, since it is larger than the sum of its proper divisors (333262417).

1247255471 is a wasteful number, since it uses less digits than its factorization.

1247255471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265622.

The product of its digits is 78400, while the sum is 38.

The square root of 1247255471 is about 35316.5042296091. The cubic root of 1247255471 is about 1076.4283795122.

The spelling of 1247255471 in words is "one billion, two hundred forty-seven million, two hundred fifty-five thousand, four hundred seventy-one".