1300138550 has 48 divisors (see below), whose sum is σ = 2457699840. Its totient is φ = 511623840.

The previous prime is 1300138547. The next prime is 1300138561. The reversal of 1300138550 is 558310031.

It is a super-2 number, since 2×1300138550² = 3380720498392205000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1749479 + ... + 1750221.

It is an arithmetic number, because the mean of its divisors is an integer number (51202080).

Almost surely, 2^1300138550 is an apocalyptic number.

1300138550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1300138550 is a deficient number, since it is larger than the sum of its proper divisors (1157561290).

1300138550 is a wasteful number, since it uses less digits than its factorization.

1300138550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1300138550 is about 36057.4340462546. The cubic root of 1300138550 is about 1091.4316541156.

Adding to 1300138550 its reverse (558310031), we get a palindrome (1858448581).

The spelling of 1300138550 in words is "one billion, three hundred million, one hundred thirty-eight thousand, five hundred fifty".