1530121530 has 48 divisors (see below), whose sum is σ = 4271853600. Its totient is φ = 349741728.

The previous prime is 1530121511. The next prime is 1530121559. The reversal of 1530121530 is 351210351.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1530121497 and 1530121506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 518980 + ... + 521919.

It is an arithmetic number, because the mean of its divisors is an integer number (88996950).

Almost surely, 2^1530121530 is an apocalyptic number.

1530121530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1530121530 is an abundant number, since it is smaller than the sum of its proper divisors (2741732070).

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

1530121530 is a wasteful number, since it uses less digits than its factorization.

1530121530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040923 (or 1040916 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1530121530 is about 39116.7678879531. The cubic root of 1530121530 is about 1152.3258611705.

Adding to 1530121530 its reverse (351210351), we get a palindrome (1881331881).

The spelling of 1530121530 in words is "one billion, five hundred thirty million, one hundred twenty-one thousand, five hundred thirty".