1351157245 has 4 divisors (see below), whose sum is σ = 1621388700. Its totient is φ = 1080925792.

The previous prime is 1351157243. The next prime is 1351157251. The reversal of 1351157245 is 5427511531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5427511531 = 13 ⋅417500887.

It can be written as a sum of positive squares in 2 ways, for example, as 755260324 + 595896921 = 27482^2 + 24411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351157245 - 2¹ = 1351157243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1351157245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351157243) 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, 135115720 + ... + 135115729.

It is an arithmetic number, because the mean of its divisors is an integer number (405347175).

Almost surely, 2^1351157245 is an apocalyptic number.

It is an amenable number.

1351157245 is a deficient number, since it is larger than the sum of its proper divisors (270231455).

1351157245 is an equidigital number, since it uses as much as digits as its factorization.

1351157245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270231454.

The product of its digits is 21000, while the sum is 34.

The square root of 1351157245 is about 36758.0908780638. The cubic root of 1351157245 is about 1105.5251614003.

Adding to 1351157245 its reverse (5427511531), we get a palindrome (6778668776).

It can be divided in two parts, 13511 and 57245, that added together give a square (70756 = 266²).

The spelling of 1351157245 in words is "one billion, three hundred fifty-one million, one hundred fifty-seven thousand, two hundred forty-five".