1226402025 has 96 divisors (see below), whose sum is σ = 2249856000. Its totient is φ = 586978560.

The previous prime is 1226402003. The next prime is 1226402029. The reversal of 1226402025 is 5202046221.

It is a happy number.

It is not a de Polignac number, because 1226402025 - 2⁹ = 1226401513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1226401986 and 1226402004.

It is not an unprimeable number, because it can be changed into a prime (1226402029) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2437924 + ... + 2438426.

It is an arithmetic number, because the mean of its divisors is an integer number (23436000).

Almost surely, 2^1226402025 is an apocalyptic number.

1226402025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1226402025 is a deficient number, since it is larger than the sum of its proper divisors (1023453975).

1226402025 is a wasteful number, since it uses less digits than its factorization.

1226402025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1226402025 is about 35020.0232010203. The cubic root of 1226402025 is about 1070.3955287961.

Adding to 1226402025 its reverse (5202046221), we get a palindrome (6428448246).

The spelling of 1226402025 in words is "one billion, two hundred twenty-six million, four hundred two thousand, twenty-five".