145215451 has 2 divisors, whose sum is σ = 145215452. Its totient is φ = 145215450.

The previous prime is 145215449. The next prime is 145215467. The reversal of 145215451 is 154512541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145215451 - 2¹ = 145215449 is a prime.

Together with 145215449, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145215401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72607725 + 72607726.

It is an arithmetic number, because the mean of its divisors is an integer number (72607726).

Almost surely, 2^145215451 is an apocalyptic number.

145215451 is a deficient number, since it is larger than the sum of its proper divisors (1).

145215451 is an equidigital number, since it uses as much as digits as its factorization.

145215451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000, while the sum is 28.

The square root of 145215451 is about 12050.5373739099. The cubic root of 145215451 is about 525.6188632514.

Adding to 145215451 its reverse (154512541), we get a palindrome (299727992).

The spelling of 145215451 in words is "one hundred forty-five million, two hundred fifteen thousand, four hundred fifty-one".