1242290626 has 8 divisors (see below), whose sum is σ = 1865055564. Its totient is φ = 620605440.

The previous prime is 1242290593. The next prime is 1242290663. The reversal of 1242290626 is 6260922421.

It can be written as a sum of positive squares in 2 ways, for example, as 1183016025 + 59274601 = 34395^2 + 7699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1242290591 and 1242290600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267055 + ... + 271666.

Almost surely, 2^1242290626 is an apocalyptic number.

1242290626 is a deficient number, since it is larger than the sum of its proper divisors (622764938).

1242290626 is a wasteful number, since it uses less digits than its factorization.

1242290626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539876.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1242290626 is about 35246.1434202382. The cubic root of 1242290626 is about 1074.9981975091.

The spelling of 1242290626 in words is "one billion, two hundred forty-two million, two hundred ninety thousand, six hundred twenty-six".