145270247 has 4 divisors (see below), whose sum is σ = 149956416. Its totient is φ = 140584080.

The previous prime is 145270187. The next prime is 145270249. The reversal of 145270247 is 742072541.

145270247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 145270247 - 2¹² = 145266151 is a prime.

It is a super-2 number, since 2×145270247² = 42206889326882018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145270249) 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, 2343038 + ... + 2343099.

It is an arithmetic number, because the mean of its divisors is an integer number (37489104).

Almost surely, 2^145270247 is an apocalyptic number.

145270247 is a deficient number, since it is larger than the sum of its proper divisors (4686169).

145270247 is an equidigital number, since it uses as much as digits as its factorization.

145270247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4686168.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 145270247 is about 12052.8107510240. The cubic root of 145270247 is about 525.6849677627.

The spelling of 145270247 in words is "one hundred forty-five million, two hundred seventy thousand, two hundred forty-seven".