1521948042 has 80 divisors (see below), whose sum is σ = 3596104512. Its totient is φ = 480142080.

The previous prime is 1521948041. The next prime is 1521948049. The reversal of 1521948042 is 2408491251.

1521948042 is a `hidden beast` number, since 1 + 521 + 94 + 8 + 0 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1521947988 and 1521948006.

It is not an unprimeable number, because it can be changed into a prime (1521948041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 359317 + ... + 363527.

Almost surely, 2^1521948042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1521948042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1798052256).

1521948042 is an abundant number, since it is smaller than the sum of its proper divisors (2074156470).

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

1521948042 is a wasteful number, since it uses less digits than its factorization.

1521948042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345 (or 4336 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1521948042 is about 39012.1524912430. The cubic root of 1521948042 is about 1150.2703943894.

The spelling of 1521948042 in words is "one billion, five hundred twenty-one million, nine hundred forty-eight thousand, forty-two".