1657253 has 4 divisors (see below), whose sum is σ = 1784748. Its totient is φ = 1529760.

The previous prime is 1657247. The next prime is 1657277. The reversal of 1657253 is 3527561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3527561 = 419 ⋅8419.

It can be written as a sum of positive squares in 2 ways, for example, as 643204 + 1014049 = 802^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 1657253 - 2⁶ = 1657189 is a prime.

It is a d-powerful number, because it can be written as 1 + 6⁶ + 5⁴ + 7 + 2⁴ + 5⁶ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1657213) 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, 63728 + ... + 63753.

It is an arithmetic number, because the mean of its divisors is an integer number (446187).

2^1657253 is an apocalyptic number.

1657253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1657253 is a deficient number, since it is larger than the sum of its proper divisors (127495).

1657253 is a wasteful number, since it uses less digits than its factorization.

1657253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127494.

The product of its digits is 6300, while the sum is 29.

The square root of 1657253 is about 1287.3433885331. The cubic root of 1657253 is about 118.3394658375.

The spelling of 1657253 in words is "one million, six hundred fifty-seven thousand, two hundred fifty-three".