1275551 has 8 divisors (see below), whose sum is σ = 1333584. Its totient is φ = 1218880.

The previous prime is 1275541. The next prime is 1275553. The reversal of 1275551 is 1555721.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1275551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275553) 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, 1880 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (166698).

2^1275551 is an apocalyptic number.

1275551 is a deficient number, since it is larger than the sum of its proper divisors (58033).

1275551 is an equidigital number, since it uses as much as digits as its factorization.

1275551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681.

The product of its digits is 1750, while the sum is 26.

The square root of 1275551 is about 1129.4029396101. The cubic root of 1275551 is about 108.4507623435.

The spelling of 1275551 in words is "one million, two hundred seventy-five thousand, five hundred fifty-one".