1245712034621 has 4 divisors (see below), whose sum is σ = 1258045817244. Its totient is φ = 1233378252000.

The previous prime is 1245712034591. The next prime is 1245712034669. The reversal of 1245712034621 is 1264302175421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1177906478596 + 67805556025 = 1085314^2 + 260395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245712034621 - 2²⁶ = 1245644925757 is a prime.

It is a super-2 number, since 2×1245712034621² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245712034521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6166891160 + ... + 6166891361.

It is an arithmetic number, because the mean of its divisors is an integer number (314511454311).

Almost surely, 2^{1245712034621} is an apocalyptic number.

It is an amenable number.

1245712034621 is a deficient number, since it is larger than the sum of its proper divisors (12333782623).

1245712034621 is a wasteful number, since it uses less digits than its factorization.

1245712034621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12333782622.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 1245712034621 in words is "one trillion, two hundred forty-five billion, seven hundred twelve million, thirty-four thousand, six hundred twenty-one".