1251013 has 4 divisors (see below), whose sum is σ = 1324620. Its totient is φ = 1177408.

The previous prime is 1251011. The next prime is 1251037. The reversal of 1251013 is 3101521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3101521 = 29 ⋅106949.

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 247009 = 1002^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251013 - 2¹ = 1251011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1250984 and 1251002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251011) 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, 36778 + ... + 36811.

It is an arithmetic number, because the mean of its divisors is an integer number (331155).

2^1251013 is an apocalyptic number.

It is an amenable number.

1251013 is a deficient number, since it is larger than the sum of its proper divisors (73607).

1251013 is an equidigital number, since it uses as much as digits as its factorization.

1251013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73606.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1251013 is about 1118.4869243760. The cubic root of 1251013 is about 107.7508258757.

Adding to 1251013 its reverse (3101521), we get a palindrome (4352534).

The spelling of 1251013 in words is "one million, two hundred fifty-one thousand, thirteen".