1523721060 has 72 divisors (see below), whose sum is σ = 4687091136. Its totient is φ = 400599360.

The previous prime is 1523721037. The next prime is 1523721061. The reversal of 1523721060 is 601273251.

It is a happy number.

1523721060 is a `hidden beast` number, since 1 + 523 + 72 + 10 + 60 = 666.

It is not an unprimeable number, because it can be changed into a prime (1523721061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46834 + ... + 72393.

It is an arithmetic number, because the mean of its divisors is an integer number (65098488).

Almost surely, 2^1523721060 is an apocalyptic number.

1523721060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1523721060 is an abundant number, since it is smaller than the sum of its proper divisors (3163370076).

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

1523721060 is a wasteful number, since it uses less digits than its factorization.

1523721060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119313 (or 119308 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1523721060 is about 39034.8697961195. The cubic root of 1523721060 is about 1150.7168964176.

The spelling of 1523721060 in words is "one billion, five hundred twenty-three million, seven hundred twenty-one thousand, sixty".