1225408402 has 8 divisors (see below), whose sum is σ = 1887791436. Its totient is φ = 596144592.

The previous prime is 1225408397. The next prime is 1225408417. The reversal of 1225408402 is 2048045221.

It can be written as a sum of positive squares in 2 ways, for example, as 1033558201 + 191850201 = 32149^2 + 13851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8279713 + ... + 8279860.

Almost surely, 2^1225408402 is an apocalyptic number.

1225408402 is a deficient number, since it is larger than the sum of its proper divisors (662383034).

1225408402 is a wasteful number, since it uses less digits than its factorization.

1225408402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16559612.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 1225408402 is about 35005.8338280921. The cubic root of 1225408402 is about 1070.1063748437.

The spelling of 1225408402 in words is "one billion, two hundred twenty-five million, four hundred eight thousand, four hundred two".