145271397 has 8 divisors (see below), whose sum is σ = 203889760. Its totient is φ = 91750320.

The previous prime is 145271389. The next prime is 145271419. The reversal of 145271397 is 793172541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145271397 - 2³ = 145271389 is a prime.

It is a super-2 number, since 2×145271397² = 42207557572663218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145271377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274254 + ... + 1274367.

It is an arithmetic number, because the mean of its divisors is an integer number (25486220).

Almost surely, 2^145271397 is an apocalyptic number.

It is an amenable number.

145271397 is a deficient number, since it is larger than the sum of its proper divisors (58618363).

145271397 is a wasteful number, since it uses less digits than its factorization.

145271397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548643.

The product of its digits is 52920, while the sum is 39.

The square root of 145271397 is about 12052.8584576440. The cubic root of 145271397 is about 525.6863549156.

The spelling of 145271397 in words is "one hundred forty-five million, two hundred seventy-one thousand, three hundred ninety-seven".