1345335021 has 32 divisors (see below), whose sum is σ = 2085765120. Its totient is φ = 855412272.

The previous prime is 1345334983. The next prime is 1345335029. The reversal of 1345335021 is 1205335431.

It is not a de Polignac number, because 1345335021 - 2¹⁷ = 1345203949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345335029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224956 + ... + 230858.

It is an arithmetic number, because the mean of its divisors is an integer number (65180160).

Almost surely, 2^1345335021 is an apocalyptic number.

It is an amenable number.

1345335021 is a deficient number, since it is larger than the sum of its proper divisors (740430099).

1345335021 is a wasteful number, since it uses less digits than its factorization.

1345335021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6302 (or 6296 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1345335021 is about 36678.8088819689. The cubic root of 1345335021 is about 1103.9349486127.

The spelling of 1345335021 in words is "one billion, three hundred forty-five million, three hundred thirty-five thousand, twenty-one".