1226651157 has 24 divisors (see below), whose sum is σ = 1853938944. Its totient is φ = 780066144.

The previous prime is 1226651143. The next prime is 1226651171. The reversal of 1226651157 is 7511566221.

It is an interprime number because it is at equal distance from previous prime (1226651143) and next prime (1226651171).

It is not a de Polignac number, because 1226651157 - 2⁶ = 1226651093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226651117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69268 + ... + 85154.

It is an arithmetic number, because the mean of its divisors is an integer number (77247456).

Almost surely, 2^1226651157 is an apocalyptic number.

It is an amenable number.

1226651157 is a deficient number, since it is larger than the sum of its proper divisors (627287787).

1226651157 is a wasteful number, since it uses less digits than its factorization.

1226651157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16289 (or 16286 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 1226651157 is about 35023.5800140420. The cubic root of 1226651157 is about 1070.4680041395.

The spelling of 1226651157 in words is "one billion, two hundred twenty-six million, six hundred fifty-one thousand, one hundred fifty-seven".