501212149 has 4 divisors (see below), whose sum is σ = 510669036. Its totient is φ = 491755264.

The previous prime is 501212119. The next prime is 501212161. The reversal of 501212149 is 941212105.

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 424772100 + 76440049 = 20610^2 + 8743^2 .

It is a cyclic number.

It is not a de Polignac number, because 501212149 - 2¹³ = 501203957 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501212119) 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, 4728364 + ... + 4728469.

It is an arithmetic number, because the mean of its divisors is an integer number (127667259).

Almost surely, 2^501212149 is an apocalyptic number.

It is an amenable number.

501212149 is a deficient number, since it is larger than the sum of its proper divisors (9456887).

501212149 is an equidigital number, since it uses as much as digits as its factorization.

501212149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456886.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 501212149 is about 22387.7678431772. The cubic root of 501212149 is about 794.3413972410.

It can be divided in two parts, 5012 and 12149, that added together give a square (17161 = 131²).

The spelling of 501212149 in words is "five hundred one million, two hundred twelve thousand, one hundred forty-nine".