634215145 has 4 divisors (see below), whose sum is σ = 761058180. Its totient is φ = 507372112.

The previous prime is 634215121. The next prime is 634215199. The reversal of 634215145 is 541512436.

It is a happy number.

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 349989264 + 284225881 = 18708^2 + 16859^2 .

It is a cyclic number.

It is not a de Polignac number, because 634215145 - 2¹³ = 634206953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63421510 + ... + 63421519.

It is an arithmetic number, because the mean of its divisors is an integer number (190264545).

Almost surely, 2^634215145 is an apocalyptic number.

It is an amenable number.

634215145 is a deficient number, since it is larger than the sum of its proper divisors (126843035).

634215145 is a wasteful number, since it uses less digits than its factorization.

634215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126843034.

The product of its digits is 14400, while the sum is 31.

The square root of 634215145 is about 25183.6285113960. The cubic root of 634215145 is about 859.1695358854.

The spelling of 634215145 in words is "six hundred thirty-four million, two hundred fifteen thousand, one hundred forty-five".