1245340051 has 4 divisors (see below), whose sum is σ = 1260344232. Its totient is φ = 1230335872.

The previous prime is 1245340021. The next prime is 1245340067. The reversal of 1245340051 is 1500435421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1245340051 - 2²¹ = 1243242899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245339998 and 1245340025.

It is not an unprimeable number, because it can be changed into a prime (1245340021) 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, 7501966 + ... + 7502131.

It is an arithmetic number, because the mean of its divisors is an integer number (315086058).

Almost surely, 2^1245340051 is an apocalyptic number.

1245340051 is a deficient number, since it is larger than the sum of its proper divisors (15004181).

1245340051 is an equidigital number, since it uses as much as digits as its factorization.

1245340051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15004180.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1245340051 is about 35289.3758941696. The cubic root of 1245340051 is about 1075.8770707004.

Adding to 1245340051 its reverse (1500435421), we get a palindrome (2745775472).

The spelling of 1245340051 in words is "one billion, two hundred forty-five million, three hundred forty thousand, fifty-one".