1553401 has 2 divisors, whose sum is σ = 1553402. Its totient is φ = 1553400.

The previous prime is 1553389. The next prime is 1553407. The reversal of 1553401 is 1043551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1498176 + 55225 = 1224^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553401 - 2⁵ = 1553369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1553407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776700 + 776701.

It is an arithmetic number, because the mean of its divisors is an integer number (776701).

2^1553401 is an apocalyptic number.

It is an amenable number.

1553401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553401 is an equidigital number, since it uses as much as digits as its factorization.

1553401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1553401 is about 1246.3550858403. The cubic root of 1553401 is about 115.8140351659.

Adding to 1553401 its reverse (1043551), we get a palindrome (2596952).

The spelling of 1553401 in words is "one million, five hundred fifty-three thousand, four hundred one".