1242487 has 2 divisors, whose sum is σ = 1242488. Its totient is φ = 1242486.

The previous prime is 1242457. The next prime is 1242503. The reversal of 1242487 is 7842421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242487 - 2⁷ = 1242359 is a prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621243 + 621244.

It is an arithmetic number, because the mean of its divisors is an integer number (621244).

2^1242487 is an apocalyptic number.

1242487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242487 is an equidigital number, since it uses as much as digits as its factorization.

1242487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 28.

The square root of 1242487 is about 1114.6690091682. The cubic root of 1242487 is about 107.5054837657.

The spelling of 1242487 in words is "one million, two hundred forty-two thousand, four hundred eighty-seven".