1215407 has 2 divisors, whose sum is σ = 1215408. Its totient is φ = 1215406.

The previous prime is 1215397. The next prime is 1215421. The reversal of 1215407 is 7045121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1215407 - 2⁴ = 1215391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607703 + 607704.

It is an arithmetic number, because the mean of its divisors is an integer number (607704).

2^1215407 is an apocalyptic number.

1215407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215407 is an equidigital number, since it uses as much as digits as its factorization.

1215407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1215407 is about 1102.4549877433. The cubic root of 1215407 is about 106.7187126652.

The spelling of 1215407 in words is "one million, two hundred fifteen thousand, four hundred seven".