145535451 has 4 divisors (see below), whose sum is σ = 194047272. Its totient is φ = 97023632.

The previous prime is 145535441. The next prime is 145535471. The reversal of 145535451 is 154535541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154535541 = 3 ⋅51511847.

It is a cyclic number.

It is not a de Polignac number, because 145535451 - 2⁶ = 145535387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145535431) 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, 24255906 + ... + 24255911.

It is an arithmetic number, because the mean of its divisors is an integer number (48511818).

Almost surely, 2^145535451 is an apocalyptic number.

145535451 is a deficient number, since it is larger than the sum of its proper divisors (48511821).

145535451 is an equidigital number, since it uses as much as digits as its factorization.

145535451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48511820.

The product of its digits is 30000, while the sum is 33.

The square root of 145535451 is about 12063.8074835435. The cubic root of 145535451 is about 526.0046684758.

The spelling of 145535451 in words is "one hundred forty-five million, five hundred thirty-five thousand, four hundred fifty-one".