1225195390 has 16 divisors (see below), whose sum is σ = 2205757008. Its totient is φ = 489988096.

The previous prime is 1225195379. The next prime is 1225195409. The reversal of 1225195390 is 935915221.

It is a super-2 number, since 2×1225195390² = 3002207487354504200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85374 + ... + 98686.

It is an arithmetic number, because the mean of its divisors is an integer number (137859813).

Almost surely, 2^1225195390 is an apocalyptic number.

1225195390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225195390 is a deficient number, since it is larger than the sum of its proper divisors (980561618).

1225195390 is a wasteful number, since it uses less digits than its factorization.

1225195390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22523.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1225195390 is about 35002.7911744192. The cubic root of 1225195390 is about 1070.0443659363.

The spelling of 1225195390 in words is "one billion, two hundred twenty-five million, one hundred ninety-five thousand, three hundred ninety".