1531420560 has 80 divisors (see below), whose sum is σ = 5274900480. Its totient is φ = 408378240.

The previous prime is 1531420559. The next prime is 1531420567. The reversal of 1531420560 is 650241351.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1531420567) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 352336 + ... + 356655.

It is an arithmetic number, because the mean of its divisors is an integer number (65936256).

Almost surely, 2^1531420560 is an apocalyptic number.

1531420560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531420560 is an abundant number, since it is smaller than the sum of its proper divisors (3743479920).

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

1531420560 is a wasteful number, since it uses less digits than its factorization.

1531420560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709013 (or 709001 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1531420560 is about 39133.3688813013. The cubic root of 1531420560 is about 1152.6518663109.

The spelling of 1531420560 in words is "one billion, five hundred thirty-one million, four hundred twenty thousand, five hundred sixty".