1421252345 has 16 divisors (see below), whose sum is σ = 1799928000. Its totient is φ = 1074362688.

The previous prime is 1421252341. The next prime is 1421252351. The reversal of 1421252345 is 5432521241.

It is a cyclic number.

It is not a de Polignac number, because 1421252345 - 2² = 1421252341 is a prime.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17726 + ... + 56184.

It is an arithmetic number, because the mean of its divisors is an integer number (112495500).

Almost surely, 2^1421252345 is an apocalyptic number.

It is an amenable number.

1421252345 is a deficient number, since it is larger than the sum of its proper divisors (378675655).

1421252345 is a wasteful number, since it uses less digits than its factorization.

1421252345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38872.

The product of its digits is 9600, while the sum is 29.

The square root of 1421252345 is about 37699.5005935092. The cubic root of 1421252345 is about 1124.3211957719.

Adding to 1421252345 its reverse (5432521241), we get a palindrome (6853773586).

The spelling of 1421252345 in words is "one billion, four hundred twenty-one million, two hundred fifty-two thousand, three hundred forty-five".