1253616 has 120 divisors (see below), whose sum is σ = 4155984. Its totient is φ = 322560.

The previous prime is 1253599. The next prime is 1253621. The reversal of 1253616 is 6163521.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30556 + ... + 30596.

2^1253616 is an apocalyptic number.

1253616 is a gapful number since it is divisible by the number (16) 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 1253616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077992).

1253616 is an abundant number, since it is smaller than the sum of its proper divisors (2902368).

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

1253616 is a wasteful number, since it uses less digits than its factorization.

1253616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 66 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 1253616 is about 1119.6499452954. The cubic root of 1253616 is about 107.8255069793.

It can be divided in two parts, 125 and 3616, that added together give a triangular number (3741 = T₈₆).

The spelling of 1253616 in words is "one million, two hundred fifty-three thousand, six hundred sixteen".