1521016434 has 32 divisors (see below), whose sum is σ = 3862899840. Its totient is φ = 434576016.

The previous prime is 1521016433. The next prime is 1521016439. The reversal of 1521016434 is 4346101251.

It is a happy number.

1521016434 is a `hidden beast` number, since 1 + 5 + 2 + 10 + 1 + 643 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1521016398 and 1521016407.

It is not an unprimeable number, because it can be changed into a prime (1521016433) 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, 2011549 + ... + 2012304.

It is an arithmetic number, because the mean of its divisors is an integer number (120715620).

Almost surely, 2^1521016434 is an apocalyptic number.

1521016434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1521016434 is an abundant number, since it is smaller than the sum of its proper divisors (2341883406).

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

1521016434 is a wasteful number, since it uses less digits than its factorization.

1521016434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023871 (or 4023865 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1521016434 is about 39000.2106917386. The cubic root of 1521016434 is about 1150.0356470362.

Adding to 1521016434 its reverse (4346101251), we get a palindrome (5867117685).

The spelling of 1521016434 in words is "one billion, five hundred twenty-one million, sixteen thousand, four hundred thirty-four".