145813761 has 6 divisors (see below), whose sum is σ = 210619890. Its totient is φ = 97209168.

The previous prime is 145813757. The next prime is 145813763. The reversal of 145813761 is 167318541.

145813761 is a `hidden beast` number, since 1 + 4 + 581 + 3 + 76 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 140778225 + 5035536 = 11865^2 + 2244^2 .

It is not a de Polignac number, because 145813761 - 2² = 145813757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145813763) 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, 8100756 + ... + 8100773.

It is an arithmetic number, because the mean of its divisors is an integer number (35103315).

Almost surely, 2^145813761 is an apocalyptic number.

It is an amenable number.

145813761 is a deficient number, since it is larger than the sum of its proper divisors (64806129).

145813761 is a wasteful number, since it uses less digits than its factorization.

145813761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16201535 (or 16201532 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 145813761 is about 12075.3368897104. The cubic root of 145813761 is about 526.3397509615.

The spelling of 145813761 in words is "one hundred forty-five million, eight hundred thirteen thousand, seven hundred sixty-one".