1225694149 has 2 divisors, whose sum is σ = 1225694150. Its totient is φ = 1225694148.

The previous prime is 1225694137. The next prime is 1225694189. The reversal of 1225694149 is 9414965221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1147989924 + 77704225 = 33882^2 + 8815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225694149 - 2⁷ = 1225694021 is a prime.

It is a super-2 number, since 2×1225694149² = 3004652293785668402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225694189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612847074 + 612847075.

It is an arithmetic number, because the mean of its divisors is an integer number (612847075).

Almost surely, 2^1225694149 is an apocalyptic number.

It is an amenable number.

1225694149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225694149 is an equidigital number, since it uses as much as digits as its factorization.

1225694149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 1225694149 is about 35009.9150098940. The cubic root of 1225694149 is about 1070.1895460056.

The spelling of 1225694149 in words is "one billion, two hundred twenty-five million, six hundred ninety-four thousand, one hundred forty-nine".