1213603057 has 8 divisors (see below), whose sum is σ = 1228245480. Its totient is φ = 1199024640.

The previous prime is 1213603033. The next prime is 1213603081. The reversal of 1213603057 is 7503063121.

It is an interprime number because it is at equal distance from previous prime (1213603033) and next prime (1213603081).

It can be written as a sum of positive squares in 4 ways, for example, as 9790641 + 1203812416 = 3129^2 + 34696^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213603057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213603007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22707 + ... + 54247.

It is an arithmetic number, because the mean of its divisors is an integer number (153530685).

Almost surely, 2^1213603057 is an apocalyptic number.

It is an amenable number.

1213603057 is a deficient number, since it is larger than the sum of its proper divisors (14642423).

1213603057 is a wasteful number, since it uses less digits than its factorization.

1213603057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32003.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1213603057 is about 34836.8060677210. The cubic root of 1213603057 is about 1066.6588816598.

Adding to 1213603057 its reverse (7503063121), we get a palindrome (8716666178).

The spelling of 1213603057 in words is "one billion, two hundred thirteen million, six hundred three thousand, fifty-seven".