145865797 has 24 divisors (see below), whose sum is σ = 196007040. Its totient is φ = 106968960.

The previous prime is 145865791. The next prime is 145865827. The reversal of 145865797 is 797568541.

It is not a de Polignac number, because 145865797 - 2²³ = 137477189 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 (145865791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1204 + ... + 17122.

It is an arithmetic number, because the mean of its divisors is an integer number (8166960).

Almost surely, 2^145865797 is an apocalyptic number.

145865797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

145865797 is a deficient number, since it is larger than the sum of its proper divisors (50141243).

145865797 is a wasteful number, since it uses less digits than its factorization.

145865797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15961 (or 15954 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 52.

The square root of 145865797 is about 12077.4913371942. The cubic root of 145865797 is about 526.4023544674.

It can be divided in two parts, 1458 and 65797, that multiplied together give a triangular number (95932026 = T₁₃₈₅₁).

The spelling of 145865797 in words is "one hundred forty-five million, eight hundred sixty-five thousand, seven hundred ninety-seven".