1257522 has 32 divisors (see below), whose sum is σ = 2918400. Its totient is φ = 353808.

The previous prime is 1257521. The next prime is 1257547. The reversal of 1257522 is 2257521.

It is a junction number, because it is equal to n+sod(n) for n = 1257492 and 1257501.

It is not an unprimeable number, because it can be changed into a prime (1257521) 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, 3129 + ... + 3507.

It is an arithmetic number, because the mean of its divisors is an integer number (91200).

2^1257522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459200).

1257522 is an abundant number, since it is smaller than the sum of its proper divisors (1660878).

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

1257522 is a wasteful number, since it uses less digits than its factorization.

1257522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470.

The product of its digits is 1400, while the sum is 24.

The square root of 1257522 is about 1121.3928838726. The cubic root of 1257522 is about 107.9373779628.

Subtracting 1257522 from its reverse (2257521), we obtain a palindrome (999999).

The spelling of 1257522 in words is "one million, two hundred fifty-seven thousand, five hundred twenty-two".