1421132345 has 4 divisors (see below), whose sum is σ = 1705358820. Its totient is φ = 1136905872.

The previous prime is 1421132309. The next prime is 1421132347. The reversal of 1421132345 is 5432311241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5432311241 = 7 ⋅776044463.

It can be written as a sum of positive squares in 2 ways, for example, as 392198416 + 1028933929 = 19804^2 + 32077^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421132345 - 2¹⁰ = 1421131321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421132347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142113230 + ... + 142113239.

It is an arithmetic number, because the mean of its divisors is an integer number (426339705).

Almost surely, 2^1421132345 is an apocalyptic number.

It is an amenable number.

1421132345 is a deficient number, since it is larger than the sum of its proper divisors (284226475).

1421132345 is an equidigital number, since it uses as much as digits as its factorization.

1421132345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284226474.

The product of its digits is 2880, while the sum is 26.

The square root of 1421132345 is about 37697.9090268943. The cubic root of 1421132345 is about 1124.2895517688.

Adding to 1421132345 its reverse (5432311241), we get a palindrome (6853443586).

The spelling of 1421132345 in words is "one billion, four hundred twenty-one million, one hundred thirty-two thousand, three hundred forty-five".