1421243652 has 24 divisors (see below), whose sum is σ = 3338496000. Its totient is φ = 470567776.

The previous prime is 1421243651. The next prime is 1421243653. The reversal of 1421243652 is 2563421241.

It is an interprime number because it is at equal distance from previous prime (1421243651) and next prime (1421243653).

It is not an unprimeable number, because it can be changed into a prime (1421243651) 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, 395652 + ... + 399227.

It is an arithmetic number, because the mean of its divisors is an integer number (139104000).

Almost surely, 2^1421243652 is an apocalyptic number.

1421243652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1421243652 is an abundant number, since it is smaller than the sum of its proper divisors (1917252348).

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

1421243652 is a wasteful number, since it uses less digits than its factorization.

1421243652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795035 (or 795033 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 1421243652 is about 37699.3853000284. The cubic root of 1421243652 is about 1124.3189034874.

Adding to 1421243652 its reverse (2563421241), we get a palindrome (3984664893).

The spelling of 1421243652 in words is "one billion, four hundred twenty-one million, two hundred forty-three thousand, six hundred fifty-two".