145451455 has 4 divisors (see below), whose sum is σ = 174541752. Its totient is φ = 116361160.

The previous prime is 145451437. The next prime is 145451459. The reversal of 145451455 is 554154541.

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

It is a de Polignac number, because none of the positive numbers 2^k-145451455 is a prime.

It is a super-2 number, since 2×145451455² = 42312251523234050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145451455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145451459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14545141 + ... + 14545150.

It is an arithmetic number, because the mean of its divisors is an integer number (43635438).

Almost surely, 2^145451455 is an apocalyptic number.

145451455 is a deficient number, since it is larger than the sum of its proper divisors (29090297).

145451455 is an equidigital number, since it uses as much as digits as its factorization.

145451455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29090296.

The product of its digits is 40000, while the sum is 34.

The square root of 145451455 is about 12060.3256589530. The cubic root of 145451455 is about 525.9034542114.

The spelling of 145451455 in words is "one hundred forty-five million, four hundred fifty-one thousand, four hundred fifty-five".