145976861 has 6 divisors (see below), whose sum is σ = 150838686. Its totient is φ = 141267000.

The previous prime is 145976849. The next prime is 145976863. The reversal of 145976861 is 168679541.

It can be written as a sum of positive squares in only one way, i.e., 85914361 + 60062500 = 9269^2 + 7750^2 .

It is a de Polignac number, because none of the positive numbers 2^k-145976861 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 (145976863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74990 + ... + 76911.

It is an arithmetic number, because the mean of its divisors is an integer number (25139781).

Almost surely, 2^145976861 is an apocalyptic number.

It is an amenable number.

145976861 is a deficient number, since it is larger than the sum of its proper divisors (4861825).

145976861 is an equidigital number, since it uses as much as digits as its factorization.

145976861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151963 (or 151932 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 145976861 is about 12082.0884370211. The cubic root of 145976861 is about 526.5359236341.

The spelling of 145976861 in words is "one hundred forty-five million, nine hundred seventy-six thousand, eight hundred sixty-one".