1351835642 has 4 divisors (see below), whose sum is σ = 2027753466. Its totient is φ = 675917820.

The previous prime is 1351835599. The next prime is 1351835647. The reversal of 1351835642 is 2465381531.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1308920041 + 42915601 = 36179^2 + 6551^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1351835596 and 1351835605.

It is not an unprimeable number, because it can be changed into a prime (1351835647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337958909 + ... + 337958912.

Almost surely, 2^1351835642 is an apocalyptic number.

1351835642 is a deficient number, since it is larger than the sum of its proper divisors (675917824).

1351835642 is an equidigital number, since it uses as much as digits as its factorization.

1351835642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675917823.

The product of its digits is 86400, while the sum is 38.

The square root of 1351835642 is about 36767.3175796114. The cubic root of 1351835642 is about 1105.7101533080.

The spelling of 1351835642 in words is "one billion, three hundred fifty-one million, eight hundred thirty-five thousand, six hundred forty-two".