1290551 has 2 divisors, whose sum is σ = 1290552. Its totient is φ = 1290550.

The previous prime is 1290539. The next prime is 1290563. The reversal of 1290551 is 1550921.

It is a balanced prime because it is at equal distance from previous prime (1290539) and next prime (1290563).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1290551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645275 + 645276.

It is an arithmetic number, because the mean of its divisors is an integer number (645276).

2^1290551 is an apocalyptic number.

1290551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290551 is an equidigital number, since it uses as much as digits as its factorization.

1290551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 1290551 is about 1136.0242074886. The cubic root of 1290551 is about 108.8742201460.

The spelling of 1290551 in words is "one million, two hundred ninety thousand, five hundred fifty-one".