145770071 has 4 divisors (see below), whose sum is σ = 153442200. Its totient is φ = 138097944.

The previous prime is 145770049. The next prime is 145770101. The reversal of 145770071 is 170077541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170077541 = 83 ⋅2049127.

It is a cyclic number.

It is not a de Polignac number, because 145770071 - 2¹⁰ = 145769047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145770571) 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, 3836036 + ... + 3836073.

It is an arithmetic number, because the mean of its divisors is an integer number (38360550).

Almost surely, 2^145770071 is an apocalyptic number.

145770071 is a deficient number, since it is larger than the sum of its proper divisors (7672129).

145770071 is an equidigital number, since it uses as much as digits as its factorization.

145770071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672128.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 145770071 is about 12073.5276949200. The cubic root of 145770071 is about 526.2871768637.

The spelling of 145770071 in words is "one hundred forty-five million, seven hundred seventy thousand, seventy-one".