1225477290 has 32 divisors (see below), whose sum is σ = 3012883776. Its totient is φ = 318823040.

The previous prime is 1225477277. The next prime is 1225477291. The reversal of 1225477290 is 927745221.

It is not an unprimeable number, because it can be changed into a prime (1225477291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496932 + ... + 499391.

It is an arithmetic number, because the mean of its divisors is an integer number (94152618).

Almost surely, 2^1225477290 is an apocalyptic number.

1225477290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225477290 is an abundant number, since it is smaller than the sum of its proper divisors (1787406486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225477290 is a wasteful number, since it uses less digits than its factorization.

1225477290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996374.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 1225477290 is about 35006.8177645441. The cubic root of 1225477290 is about 1070.1264269631.

The spelling of 1225477290 in words is "one billion, two hundred twenty-five million, four hundred seventy-seven thousand, two hundred ninety".