1243402134 has 32 divisors (see below), whose sum is σ = 2835635040. Its totient is φ = 360079872.

The previous prime is 1243402133. The next prime is 1243402141. The reversal of 1243402134 is 4312043421.

1243402134 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243402133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467529 + ... + 470180.

It is an arithmetic number, because the mean of its divisors is an integer number (88613595).

Almost surely, 2^1243402134 is an apocalyptic number.

1243402134 is an abundant number, since it is smaller than the sum of its proper divisors (1592232906).

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

1243402134 is a wasteful number, since it uses less digits than its factorization.

1243402134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937744.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1243402134 is about 35261.9076908780. The cubic root of 1243402134 is about 1075.3187110532.

Adding to 1243402134 its reverse (4312043421), we get a palindrome (5555445555).

The spelling of 1243402134 in words is "one billion, two hundred forty-three million, four hundred two thousand, one hundred thirty-four".