1302342421 has 4 divisors (see below), whose sum is σ = 1320685344. Its totient is φ = 1283999500.

The previous prime is 1302342367. The next prime is 1302342427. The reversal of 1302342421 is 1242432031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1242432031 = 109 ⋅11398459.

It is a de Polignac number, because none of the positive numbers 2^k-1302342421 is a prime.

It is a super-2 number, since 2×1302342421² = 3392191563072282482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1302342392 and 1302342401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302342427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9171355 + ... + 9171496.

It is an arithmetic number, because the mean of its divisors is an integer number (330171336).

Almost surely, 2^1302342421 is an apocalyptic number.

It is an amenable number.

1302342421 is a deficient number, since it is larger than the sum of its proper divisors (18342923).

1302342421 is an equidigital number, since it uses as much as digits as its factorization.

1302342421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18342922.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1302342421 is about 36087.9816698025. The cubic root of 1302342421 is about 1092.0480029729.

Adding to 1302342421 its reverse (1242432031), we get a palindrome (2544774452).

The spelling of 1302342421 in words is "one billion, three hundred two million, three hundred forty-two thousand, four hundred twenty-one".