1234661645 has 16 divisors (see below), whose sum is σ = 1747872768. Its totient is φ = 819313920.

The previous prime is 1234661633. The next prime is 1234661657. The reversal of 1234661645 is 5461664321.

It is an interprime number because it is at equal distance from previous prime (1234661633) and next prime (1234661657).

It is not a de Polignac number, because 1234661645 - 2⁶ = 1234661581 is a prime.

It is a super-3 number, since 3×1234661645³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1234661599 and 1234661608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567884 + ... + 570053.

It is an arithmetic number, because the mean of its divisors is an integer number (109242048).

Almost surely, 2^1234661645 is an apocalyptic number.

It is an amenable number.

1234661645 is a deficient number, since it is larger than the sum of its proper divisors (513211123).

1234661645 is a wasteful number, since it uses less digits than its factorization.

1234661645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137980.

The product of its digits is 103680, while the sum is 38.

The square root of 1234661645 is about 35137.7524181613. The cubic root of 1234661645 is about 1072.7931347910.

The spelling of 1234661645 in words is "one billion, two hundred thirty-four million, six hundred sixty-one thousand, six hundred forty-five".