1245131 has 4 divisors (see below), whose sum is σ = 1318392. Its totient is φ = 1171872.

The previous prime is 1245121. The next prime is 1245137. The reversal of 1245131 is 1315421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1315421 = 887 ⋅1483.

It is a cyclic number.

It is not a de Polignac number, because 1245131 - 2⁶ = 1245067 is a prime.

It is a super-2 number, since 2×1245131² = 3100702414322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 73243 = 1245131 / (1 + 2 + 4 + 5 + 1 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245137) 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, 36605 + ... + 36638.

It is an arithmetic number, because the mean of its divisors is an integer number (329598).

2^1245131 is an apocalyptic number.

1245131 is a deficient number, since it is larger than the sum of its proper divisors (73261).

1245131 is an equidigital number, since it uses as much as digits as its factorization.

1245131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73260.

The product of its digits is 120, while the sum is 17.

The square root of 1245131 is about 1115.8543811806. The cubic root of 1245131 is about 107.5816866056.

The spelling of 1245131 in words is "one million, two hundred forty-five thousand, one hundred thirty-one".