1247802402 has 64 divisors (see below), whose sum is σ = 3131403264. Its totient is φ = 322021440.

The previous prime is 1247802383. The next prime is 1247802407. The reversal of 1247802402 is 2042087421.

1247802402 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1247802402.

It is not an unprimeable number, because it can be changed into a prime (1247802407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63933 + ... + 81135.

It is an arithmetic number, because the mean of its divisors is an integer number (48928176).

Almost surely, 2^1247802402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247802402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565701632).

1247802402 is an abundant number, since it is smaller than the sum of its proper divisors (1883600862).

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

1247802402 is a wasteful number, since it uses less digits than its factorization.

1247802402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17383.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 1247802402 is about 35324.2466586338. The cubic root of 1247802402 is about 1076.5856971936.

Adding to 1247802402 its reverse (2042087421), we get a palindrome (3289889823).

The spelling of 1247802402 in words is "one billion, two hundred forty-seven million, eight hundred two thousand, four hundred two".