1421252347 has 4 divisors (see below), whose sum is σ = 1421652816. Its totient is φ = 1420851880.

The previous prime is 1421252341. The next prime is 1421252351. The reversal of 1421252347 is 7432521241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1421252347 - 2⁷ = 1421252219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421252341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194863 + ... + 202024.

It is an arithmetic number, because the mean of its divisors is an integer number (355413204).

Almost surely, 2^1421252347 is an apocalyptic number.

1421252347 is a deficient number, since it is larger than the sum of its proper divisors (400469).

1421252347 is an equidigital number, since it uses as much as digits as its factorization.

1421252347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400468.

The product of its digits is 13440, while the sum is 31.

The square root of 1421252347 is about 37699.5006200347. The cubic root of 1421252347 is about 1124.3211962993.

Adding to 1421252347 its reverse (7432521241), we get a palindrome (8853773588).

The spelling of 1421252347 in words is "one billion, four hundred twenty-one million, two hundred fifty-two thousand, three hundred forty-seven".