145734971 has 4 divisors (see below), whose sum is σ = 149673792. Its totient is φ = 141796152.

The previous prime is 145734949. The next prime is 145735019. The reversal of 145734971 is 179437541.

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 145734971 - 2²² = 141540667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145737971) 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, 1969355 + ... + 1969428.

It is an arithmetic number, because the mean of its divisors is an integer number (37418448).

Almost surely, 2^145734971 is an apocalyptic number.

145734971 is a deficient number, since it is larger than the sum of its proper divisors (3938821).

145734971 is an equidigital number, since it uses as much as digits as its factorization.

145734971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938820.

The product of its digits is 105840, while the sum is 41.

The square root of 145734971 is about 12072.0740140210. The cubic root of 145734971 is about 526.2449318800.

The spelling of 145734971 in words is "one hundred forty-five million, seven hundred thirty-four thousand, nine hundred seventy-one".