1400145561 has 16 divisors (see below), whose sum is σ = 2075788800. Its totient is φ = 932755824.

The previous prime is 1400145553. The next prime is 1400145581. The reversal of 1400145561 is 1655410041.

It is not a de Polignac number, because 1400145561 - 2³ = 1400145553 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1400145521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20835 + ... + 56871.

It is an arithmetic number, because the mean of its divisors is an integer number (129736800).

Almost surely, 2^1400145561 is an apocalyptic number.

It is an amenable number.

1400145561 is a deficient number, since it is larger than the sum of its proper divisors (675643239).

1400145561 is a wasteful number, since it uses less digits than its factorization.

1400145561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37485 (or 37479 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1400145561 is about 37418.5189578636. The cubic root of 1400145561 is about 1118.7277115666.

The spelling of 1400145561 in words is "one billion, four hundred million, one hundred forty-five thousand, five hundred sixty-one".