1420251051645 has 12 divisors (see below), whose sum is σ = 2461768489596. Its totient is φ = 757467227520.

The previous prime is 1420251051641. The next prime is 1420251051671. The reversal of 1420251051645 is 5461501520241.

1420251051645 is a `hidden beast` number, since 1 + 4 + 2 + 0 + 2 + 5 + 1 + 0 + 5 + 1 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1093409018244 + 326842033401 = 1045662^2 + 571701^2 .

It is not a de Polignac number, because 1420251051645 - 2² = 1420251051641 is a prime.

It is a super-2 number, since 2×1420251051645² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420251051641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15780567196 + ... + 15780567285.

It is an arithmetic number, because the mean of its divisors is an integer number (205147374133).

Almost surely, 2^{1420251051645} is an apocalyptic number.

1420251051645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1420251051645 is a deficient number, since it is larger than the sum of its proper divisors (1041517437951).

1420251051645 is a wasteful number, since it uses less digits than its factorization.

1420251051645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31561134492 (or 31561134489 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 1420251051645 its reverse (5461501520241), we get a palindrome (6881752571886).

The spelling of 1420251051645 in words is "one trillion, four hundred twenty billion, two hundred fifty-one million, fifty-one thousand, six hundred forty-five".