1283975 has 48 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 739200.

The previous prime is 1283969. The next prime is 1283981. The reversal of 1283975 is 5793821.

1283975 = 231² + 232² + ... + 252².

It is an interprime number because it is at equal distance from previous prime (1283969) and next prime (1283981).

It is not a de Polignac number, because 1283975 - 2⁸ = 1283719 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

Its product of digits (15120) is a multiple of the sum of its prime factors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44261 + ... + 44289.

It is an arithmetic number, because the mean of its divisors is an integer number (44640).

2^1283975 is an apocalyptic number.

1283975 is a deficient number, since it is larger than the sum of its proper divisors (858745).

1283975 is a wasteful number, since it uses less digits than its factorization.

1283975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 75 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 1283975 is about 1133.1262065631. The cubic root of 1283975 is about 108.6889823733.

The spelling of 1283975 in words is "one million, two hundred eighty-three thousand, nine hundred seventy-five".