1243261402 has 16 divisors (see below), whose sum is σ = 1876852224. Its totient is φ = 617652000.

The previous prime is 1243261387. The next prime is 1243261403. The reversal of 1243261402 is 2041623421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1243261403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491902 + ... + 494422.

It is an arithmetic number, because the mean of its divisors is an integer number (117303264).

Almost surely, 2^1243261402 is an apocalyptic number.

1243261402 is a deficient number, since it is larger than the sum of its proper divisors (633590822).

1243261402 is a wasteful number, since it uses less digits than its factorization.

1243261402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1243261402 is about 35259.9121099302. The cubic root of 1243261402 is about 1075.2781402520.

Adding to 1243261402 its reverse (2041623421), we get a palindrome (3284884823).

The spelling of 1243261402 in words is "one billion, two hundred forty-three million, two hundred sixty-one thousand, four hundred two".