145239807 has 8 divisors (see below), whose sum is σ = 194315184. Its totient is φ = 96495488.

The previous prime is 145239797. The next prime is 145239817. The reversal of 145239807 is 708932541.

It is an interprime number because it is at equal distance from previous prime (145239797) and next prime (145239817).

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

It is a cyclic number.

It is not a de Polignac number, because 145239807 - 2¹² = 145235711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145239817) 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, 81738 + ... + 83495.

It is an arithmetic number, because the mean of its divisors is an integer number (24289398).

Almost surely, 2^145239807 is an apocalyptic number.

145239807 is a deficient number, since it is larger than the sum of its proper divisors (49075377).

145239807 is a wasteful number, since it uses less digits than its factorization.

145239807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165529.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 145239807 is about 12051.5479088788. The cubic root of 145239807 is about 525.6482477677.

The spelling of 145239807 in words is "one hundred forty-five million, two hundred thirty-nine thousand, eight hundred seven".