1291482144 has 60 divisors (see below), whose sum is σ = 3798220734. Its totient is φ = 430493184.

The previous prime is 1291482107. The next prime is 1291482161. The reversal of 1291482144 is 4412841921.

It can be written as a sum of positive squares in only one way, i.e., 1128153744 + 163328400 = 33588^2 + 12780^2 .

It is a super-2 number, since 2×1291482144² = 3335852256541673472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1291482099 and 1291482108.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 246537 + ... + 251720.

Almost surely, 2^1291482144 is an apocalyptic number.

It is an amenable number.

1291482144 is an abundant number, since it is smaller than the sum of its proper divisors (2506738590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1291482144 is an equidigital number, since it uses as much as digits as its factorization.

1291482144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498279 (or 498262 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1291482144 is about 35937.1972195941. The cubic root of 1291482144 is about 1089.0039842306.

The spelling of 1291482144 in words is "one billion, two hundred ninety-one million, four hundred eighty-two thousand, one hundred forty-four".