1257560 has 32 divisors (see below), whose sum is σ = 2862000. Its totient is φ = 497280.

The previous prime is 1257559. The next prime is 1257563. The reversal of 1257560 is 657521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5855 + ... + 6065.

2^1257560 is an apocalyptic number.

1257560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1257560 is an abundant number, since it is smaller than the sum of its proper divisors (1604440).

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

1257560 is a wasteful number, since it uses less digits than its factorization.

1257560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 1257560 is about 1121.4098269589. The cubic root of 1257560 is about 107.9384651748.

The spelling of 1257560 in words is "one million, two hundred fifty-seven thousand, five hundred sixty".