1225959901 has 4 divisors (see below), whose sum is σ = 1255861404. Its totient is φ = 1196058400.

The previous prime is 1225959899. The next prime is 1225959923. The reversal of 1225959901 is 1099595221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35640900 + 1190319001 = 5970^2 + 34501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225959901 - 2¹ = 1225959899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225959991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14950690 + ... + 14950771.

It is an arithmetic number, because the mean of its divisors is an integer number (313965351).

Almost surely, 2^1225959901 is an apocalyptic number.

It is an amenable number.

1225959901 is a deficient number, since it is larger than the sum of its proper divisors (29901503).

1225959901 is an equidigital number, since it uses as much as digits as its factorization.

1225959901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29901502.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 1225959901 is about 35013.7101861542. The cubic root of 1225959901 is about 1070.2668857074.

It can be divided in two parts, 122595 and 9901, that added together give a square (132496 = 364²).

The spelling of 1225959901 in words is "one billion, two hundred twenty-five million, nine hundred fifty-nine thousand, nine hundred one".