1225437250 has 16 divisors (see below), whose sum is σ = 2294019000. Its totient is φ = 490174800.

The previous prime is 1225437193. The next prime is 1225437277. The reversal of 1225437250 is 527345221.

It can be written as a sum of positive squares in 4 ways, for example, as 624550081 + 600887169 = 24991^2 + 24513^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450625 + ... + 2451124.

Almost surely, 2^1225437250 is an apocalyptic number.

1225437250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225437250 is a deficient number, since it is larger than the sum of its proper divisors (1068581750).

1225437250 is an equidigital number, since it uses as much as digits as its factorization.

1225437250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4901766 (or 4901756 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 1225437250 is about 35006.2458712727. The cubic root of 1225437250 is about 1070.1147720949.

The spelling of 1225437250 in words is "one billion, two hundred twenty-five million, four hundred thirty-seven thousand, two hundred fifty".