145240553 has 4 divisors (see below), whose sum is σ = 145776768. Its totient is φ = 144704340.
The previous prime is 145240547. The next prime is 145240567. The reversal of 145240553 is 355042541.
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 a cyclic number.
It is not a de Polignac number, because 145240553 - 26 = 145240489 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (145240583) 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, 267701 + ... + 268242.
It is an arithmetic number, because the mean of its divisors is an integer number (36444192).
Almost surely, 2145240553 is an apocalyptic number.
It is an amenable number.
145240553 is a deficient number, since it is larger than the sum of its proper divisors (536215).
145240553 is an equidigital number, since it uses as much as digits as its factorization.
145240553 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 536214.
The product of its (nonzero) digits is 12000, while the sum is 29.
The square root of 145240553 is about 12051.5788592201. The cubic root of 145240553 is about 525.6491477343.
The spelling of 145240553 in words is "one hundred forty-five million, two hundred forty thousand, five hundred fifty-three".
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