1242531250 has 28 divisors (see below), whose sum is σ = 2329774866. Its totient is φ = 497000000.

The previous prime is 1242531229. The next prime is 1242531289. The reversal of 1242531250 is 521352421.

It can be written as a sum of positive squares in 7 ways, for example, as 951043921 + 291487329 = 30839^2 + 17073^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 11370 + ... + 51130.

Almost surely, 2^1242531250 is an apocalyptic number.

1242531250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242531250 is a deficient number, since it is larger than the sum of its proper divisors (1087243616).

1242531250 is an frugal number, since it uses more digits than its factorization.

1242531250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39793 (or 39768 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1242531250 is about 35249.5567348016. The cubic root of 1242531250 is about 1075.0675998593.

Adding to 1242531250 its reverse (521352421), we get a palindrome (1763883671).

The spelling of 1242531250 in words is "one billion, two hundred forty-two million, five hundred thirty-one thousand, two hundred fifty".