1551013 has 2 divisors, whose sum is σ = 1551014. Its totient is φ = 1551012.

The previous prime is 1551001. The next prime is 1551019. The reversal of 1551013 is 3101551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119364 + 431649 = 1058^2 + 657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551013 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775506 + 775507.

It is an arithmetic number, because the mean of its divisors is an integer number (775507).

2^1551013 is an apocalyptic number.

It is an amenable number.

1551013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551013 is an equidigital number, since it uses as much as digits as its factorization.

1551013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 1551013 is about 1245.3967239398. The cubic root of 1551013 is about 115.7546588350.

Adding to 1551013 its reverse (3101551), we get a palindrome (4652564).

The spelling of 1551013 in words is "one million, five hundred fifty-one thousand, thirteen".