1521672 has 64 divisors (see below), whose sum is σ = 4147200. Its totient is φ = 463680.

The previous prime is 1521671. The next prime is 1521673. The reversal of 1521672 is 2761251.

It is an interprime number because it is at equal distance from previous prime (1521671) and next prime (1521673).

It is a Harshad number since it is a multiple of its sum of digits (24).

1521672 is a modest number, since divided by 1672 gives 152 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1521671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21397 + ... + 21467.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2^1521672 is an apocalyptic number.

1521672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1521672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2073600).

1521672 is an abundant number, since it is smaller than the sum of its proper divisors (2625528).

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

1521672 is a wasteful number, since it uses less digits than its factorization.

1521672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 142 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1521672 is about 1233.5606997631. The cubic root of 1521672 is about 115.0200847088.

The spelling of 1521672 in words is "one million, five hundred twenty-one thousand, six hundred seventy-two".