145211709 has 16 divisors (see below), whose sum is σ = 198705024. Its totient is φ = 94272000.

The previous prime is 145211683. The next prime is 145211723. The reversal of 145211709 is 907112541.

145211709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145211709 - 2⁸ = 145211453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145211749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120309 + ... + 121509.

It is an arithmetic number, because the mean of its divisors is an integer number (12419064).

Almost surely, 2^145211709 is an apocalyptic number.

It is an amenable number.

145211709 is a deficient number, since it is larger than the sum of its proper divisors (53493315).

145211709 is a wasteful number, since it uses less digits than its factorization.

145211709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 145211709 is about 12050.3821101241. The cubic root of 145211709 is about 525.6143483905.

The spelling of 145211709 in words is "one hundred forty-five million, two hundred eleven thousand, seven hundred nine".