1521642 has 8 divisors (see below), whose sum is σ = 3043296. Its totient is φ = 507212.

The previous prime is 1521629. The next prime is 1521643. The reversal of 1521642 is 2461251.

It is a sphenic number, since it is the product of 3 distinct primes.

1521642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1521643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126798 + ... + 126809.

It is an arithmetic number, because the mean of its divisors is an integer number (380412).

2^1521642 is an apocalyptic number.

1521642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1521642 is a wasteful number, since it uses less digits than its factorization.

1521642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253612.

The product of its digits is 480, while the sum is 21.

The square root of 1521642 is about 1233.5485397827. The cubic root of 1521642 is about 115.0193288242.

Adding to 1521642 its reverse (2461251), we get a palindrome (3982893).

The spelling of 1521642 in words is "one million, five hundred twenty-one thousand, six hundred forty-two".