1375537 has 4 divisors (see below), whose sum is σ = 1386496. Its totient is φ = 1364580.

The previous prime is 1375531. The next prime is 1375547. The reversal of 1375537 is 7355731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7355731 = 2389 ⋅3079.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1375499 and 1375508.

It is not an unprimeable number, because it can be changed into a prime (1375531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5289 + ... + 5542.

It is an arithmetic number, because the mean of its divisors is an integer number (346624).

2^1375537 is an apocalyptic number.

It is an amenable number.

1375537 is a deficient number, since it is larger than the sum of its proper divisors (10959).

1375537 is a wasteful number, since it uses less digits than its factorization.

1375537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10958.

The product of its digits is 11025, while the sum is 31.

The square root of 1375537 is about 1172.8328951731. The cubic root of 1375537 is about 111.2134787329.

The spelling of 1375537 in words is "one million, three hundred seventy-five thousand, five hundred thirty-seven".