1302121042 has 4 divisors (see below), whose sum is σ = 1953181566. Its totient is φ = 651060520.

The previous prime is 1302121033. The next prime is 1302121049. The reversal of 1302121042 is 2401212031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1195845561 + 106275481 = 34581^2 + 10309^2 .

It is not an unprimeable number, because it can be changed into a prime (1302121049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325530259 + ... + 325530262.

Almost surely, 2^1302121042 is an apocalyptic number.

1302121042 is a deficient number, since it is larger than the sum of its proper divisors (651060524).

1302121042 is an equidigital number, since it uses as much as digits as its factorization.

1302121042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651060523.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1302121042 is about 36084.9143271811. The cubic root of 1302121042 is about 1091.9861221161.

Adding to 1302121042 its reverse (2401212031), we get a palindrome (3703333073).

The spelling of 1302121042 in words is "one billion, three hundred two million, one hundred twenty-one thousand, forty-two".