145253001 has 4 divisors (see below), whose sum is σ = 193670672. Its totient is φ = 96835332.

The previous prime is 145252997. The next prime is 145253029. The reversal of 145253001 is 100352541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 145253001 - 2² = 145252997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145253051) 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, 24208831 + ... + 24208836.

It is an arithmetic number, because the mean of its divisors is an integer number (48417668).

Almost surely, 2^145253001 is an apocalyptic number.

It is an amenable number.

145253001 is a deficient number, since it is larger than the sum of its proper divisors (48417671).

145253001 is an equidigital number, since it uses as much as digits as its factorization.

145253001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48417670.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 145253001 is about 12052.0952950099. The cubic root of 145253001 is about 525.6641644165.

The spelling of 145253001 in words is "one hundred forty-five million, two hundred fifty-three thousand, one".