1400442545 has 4 divisors (see below), whose sum is σ = 1680531060. Its totient is φ = 1120354032.

The previous prime is 1400442529. The next prime is 1400442583. The reversal of 1400442545 is 5452440041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5452440041 = 863 ⋅6318007.

It can be written as a sum of positive squares in 2 ways, for example, as 422754721 + 977687824 = 20561^2 + 31268^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400442545 - 2⁴ = 1400442529 is a prime.

It is a super-2 number, since 2×1400442545² = 3922478643692154050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140044250 + ... + 140044259.

It is an arithmetic number, because the mean of its divisors is an integer number (420132765).

Almost surely, 2^1400442545 is an apocalyptic number.

It is an amenable number.

1400442545 is a deficient number, since it is larger than the sum of its proper divisors (280088515).

1400442545 is an equidigital number, since it uses as much as digits as its factorization.

1400442545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280088514.

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 1400442545 is about 37422.4871567885. The cubic root of 1400442545 is about 1118.8068035201.

Adding to 1400442545 its reverse (5452440041), we get a palindrome (6852882586).

The spelling of 1400442545 in words is "one billion, four hundred million, four hundred forty-two thousand, five hundred forty-five".