145620271 has 4 divisors (see below), whose sum is σ = 149555992. Its totient is φ = 141684552.

The previous prime is 145620269. The next prime is 145620301. The reversal of 145620271 is 172026541.

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 145620271 - 2¹ = 145620269 is a prime.

It is a super-2 number, since 2×145620271² = 42410526652226882, 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 (145620221) 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, 1967805 + ... + 1967878.

It is an arithmetic number, because the mean of its divisors is an integer number (37388998).

Almost surely, 2^145620271 is an apocalyptic number.

145620271 is a deficient number, since it is larger than the sum of its proper divisors (3935721).

145620271 is an equidigital number, since it uses as much as digits as its factorization.

145620271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935720.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 145620271 is about 12067.3224453480. The cubic root of 145620271 is about 526.1068361399.

The spelling of 145620271 in words is "one hundred forty-five million, six hundred twenty thousand, two hundred seventy-one".