1247671425 has 96 divisors (see below), whose sum is σ = 2769822720. Its totient is φ = 478598400.

The previous prime is 1247671421. The next prime is 1247671441. The reversal of 1247671425 is 5241767421.

It is not a de Polignac number, because 1247671425 - 2² = 1247671421 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1247671421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 66766 + ... + 83384.

It is an arithmetic number, because the mean of its divisors is an integer number (28852320).

Almost surely, 2^1247671425 is an apocalyptic number.

1247671425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1247671425 is an abundant number, since it is smaller than the sum of its proper divisors (1522151295).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1247671425 is a wasteful number, since it uses less digits than its factorization.

1247671425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16663 (or 16658 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 1247671425 is about 35322.3926850943. The cubic root of 1247671425 is about 1076.5480275277.

The spelling of 1247671425 in words is "one billion, two hundred forty-seven million, six hundred seventy-one thousand, four hundred twenty-five".