1225381667 has 2 divisors, whose sum is σ = 1225381668. Its totient is φ = 1225381666.

The previous prime is 1225381643. The next prime is 1225381691. The reversal of 1225381667 is 7661835221.

It is a balanced prime because it is at equal distance from previous prime (1225381643) and next prime (1225381691).

It is a cyclic number.

It is not a de Polignac number, because 1225381667 - 2¹⁸ = 1225119523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225383667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612690833 + 612690834.

It is an arithmetic number, because the mean of its divisors is an integer number (612690834).

Almost surely, 2^1225381667 is an apocalyptic number.

1225381667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225381667 is an equidigital number, since it uses as much as digits as its factorization.

1225381667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 1225381667 is about 35005.4519610874. The cubic root of 1225381667 is about 1070.0985925397.

The spelling of 1225381667 in words is "one billion, two hundred twenty-five million, three hundred eighty-one thousand, six hundred sixty-seven".