1491616 has 24 divisors (see below), whose sum is σ = 3356640. Its totient is φ = 639168.

The previous prime is 1491601. The next prime is 1491629. The reversal of 1491616 is 6161941.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3106 + ... + 3553.

It is an arithmetic number, because the mean of its divisors is an integer number (139860).

2^1491616 is an apocalyptic number.

1491616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1491616 is an abundant number, since it is smaller than the sum of its proper divisors (1865024).

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

1491616 is an equidigital number, since it uses as much as digits as its factorization.

1491616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676 (or 6668 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 1491616 is about 1221.3173215835. The cubic root of 1491616 is about 114.2577526832.

The spelling of 1491616 in words is "one million, four hundred ninety-one thousand, six hundred sixteen".