501121487 has 4 divisors (see below), whose sum is σ = 503890296. Its totient is φ = 498352680.

The previous prime is 501121459. The next prime is 501121501. The reversal of 501121487 is 784121105.

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

It is a cyclic number.

It is not a de Polignac number, because 501121487 - 2¹² = 501117391 is a prime.

It is a super-2 number, since 2×501121487² = 502245489466182338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501121457) 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, 1384133 + ... + 1384494.

It is an arithmetic number, because the mean of its divisors is an integer number (125972574).

Almost surely, 2^501121487 is an apocalyptic number.

501121487 is a deficient number, since it is larger than the sum of its proper divisors (2768809).

501121487 is a wasteful number, since it uses less digits than its factorization.

501121487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768808.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 501121487 is about 22385.7429405414. The cubic root of 501121487 is about 794.2934994114.

The spelling of 501121487 in words is "five hundred one million, one hundred twenty-one thousand, four hundred eighty-seven".