1281957 has 8 divisors (see below), whose sum is σ = 1714560. Its totient is φ = 852000.

The previous prime is 1281941. The next prime is 1281961. The reversal of 1281957 is 7591821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1281957 - 2⁴ = 1281941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281937) 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, 1332 + ... + 2082.

It is an arithmetic number, because the mean of its divisors is an integer number (214320).

2^1281957 is an apocalyptic number.

It is an amenable number.

1281957 is a deficient number, since it is larger than the sum of its proper divisors (432603).

1281957 is an equidigital number, since it uses as much as digits as its factorization.

1281957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323.

The product of its digits is 5040, while the sum is 33.

The square root of 1281957 is about 1132.2353995526. The cubic root of 1281957 is about 108.6320110214.

The spelling of 1281957 in words is "one million, two hundred eighty-one thousand, nine hundred fifty-seven".