1225690026 has 16 divisors (see below), whose sum is σ = 2674232928. Its totient is φ = 371421200.

The previous prime is 1225689979. The next prime is 1225690043. The reversal of 1225690026 is 6200965221.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 9285465 + ... + 9285596.

It is an arithmetic number, because the mean of its divisors is an integer number (167139558).

Almost surely, 2^1225690026 is an apocalyptic number.

1225690026 is an abundant number, since it is smaller than the sum of its proper divisors (1448542902).

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

1225690026 is a wasteful number, since it uses less digits than its factorization.

1225690026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18571077.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1225690026 is about 35009.8561265253. The cubic root of 1225690026 is about 1070.1883460334.

The spelling of 1225690026 in words is "one billion, two hundred twenty-five million, six hundred ninety thousand, twenty-six".