65142149 has 4 divisors (see below), whose sum is σ = 67388460. Its totient is φ = 62895840.

The previous prime is 65142139. The next prime is 65142169. The reversal of 65142149 is 94124156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11222500 + 53919649 = 3350^2 + 7343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65142149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65142139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1123112 + ... + 1123169.

It is an arithmetic number, because the mean of its divisors is an integer number (16847115).

Almost surely, 2^65142149 is an apocalyptic number.

It is an amenable number.

65142149 is a deficient number, since it is larger than the sum of its proper divisors (2246311).

65142149 is a wasteful number, since it uses less digits than its factorization.

65142149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246310.

The product of its digits is 8640, while the sum is 32.

The square root of 65142149 is about 8071.0686405209. The cubic root of 65142149 is about 402.3654609946.

The spelling of 65142149 in words is "sixty-five million, one hundred forty-two thousand, one hundred forty-nine".