1351415291 has 4 divisors (see below), whose sum is σ = 1351532832. Its totient is φ = 1351297752.

The previous prime is 1351415287. The next prime is 1351415297. The reversal of 1351415291 is 1925141531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1925141531 = 397 ⋅4849223.

It is a cyclic number.

It is not a de Polignac number, because 1351415291 - 2² = 1351415287 is a prime.

It is a super-2 number, since 2×1351415291² = 3652646577497229362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1351415297) 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, 39395 + ... + 65228.

It is an arithmetic number, because the mean of its divisors is an integer number (337883208).

Almost surely, 2^1351415291 is an apocalyptic number.

1351415291 is a deficient number, since it is larger than the sum of its proper divisors (117541).

1351415291 is a wasteful number, since it uses less digits than its factorization.

1351415291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117540.

The product of its digits is 5400, while the sum is 32.

The square root of 1351415291 is about 36761.6007676488. The cubic root of 1351415291 is about 1105.5955351948.

The spelling of 1351415291 in words is "one billion, three hundred fifty-one million, four hundred fifteen thousand, two hundred ninety-one".