1225145530 has 24 divisors (see below), whose sum is σ = 2565305748. Its totient is φ = 420049728.

The previous prime is 1225145507. The next prime is 1225145543. The reversal of 1225145530 is 355415221.

It can be written as a sum of positive squares in 2 ways, for example, as 1138860009 + 86285521 = 33747^2 + 9289^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1249659 + ... + 1250638.

Almost surely, 2^1225145530 is an apocalyptic number.

1225145530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225145530 is an abundant number, since it is smaller than the sum of its proper divisors (1340160218).

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

1225145530 is a wasteful number, since it uses less digits than its factorization.

1225145530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500318 (or 2500311 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1225145530 is about 35002.0789382574. The cubic root of 1225145530 is about 1070.0298503915.

The spelling of 1225145530 in words is "one billion, two hundred twenty-five million, one hundred forty-five thousand, five hundred thirty".