1488658261 has 4 divisors (see below), whose sum is σ = 1576226412. Its totient is φ = 1401090112.

The previous prime is 1488658229. The next prime is 1488658273. The reversal of 1488658261 is 1628568841.

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 575712036 + 912946225 = 23994^2 + 30215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1488658261 - 2⁵ = 1488658229 is a prime.

It is a super-3 number, since 3×1488658261³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1488658861) 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, 43784050 + ... + 43784083.

It is an arithmetic number, because the mean of its divisors is an integer number (394056603).

Almost surely, 2^1488658261 is an apocalyptic number.

It is an amenable number.

1488658261 is a deficient number, since it is larger than the sum of its proper divisors (87568151).

1488658261 is an equidigital number, since it uses as much as digits as its factorization.

1488658261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87568150.

The product of its digits is 737280, while the sum is 49.

The square root of 1488658261 is about 38583.1344112943. The cubic root of 1488658261 is about 1141.8218179703.

The spelling of 1488658261 in words is "one billion, four hundred eighty-eight million, six hundred fifty-eight thousand, two hundred sixty-one".