1521046402042 has 16 divisors (see below), whose sum is σ = 2294429856264. Its totient is φ = 756237384000.

The previous prime is 1521046402013. The next prime is 1521046402093. The reversal of 1521046402042 is 2402046401251.

It can be written as a sum of positive squares in 4 ways, for example, as 773099906121 + 747946495921 = 879261^2 + 864839^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1521046401995 and 1521046402013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3094692 + ... + 3552352.

Almost surely, 2^{1521046402042} is an apocalyptic number.

1521046402042 is a deficient number, since it is larger than the sum of its proper divisors (773383454222).

1521046402042 is a wasteful number, since it uses less digits than its factorization.

1521046402042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467025.

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 1521046402042 in words is "one trillion, five hundred twenty-one billion, forty-six million, four hundred two thousand, forty-two".