1405220025 has 24 divisors (see below), whose sum is σ = 2534507424. Its totient is φ = 681318400.

The previous prime is 1405219999. The next prime is 1405220041. The reversal of 1405220025 is 5200225041.

It is a happy number.

It is not a de Polignac number, because 1405220025 - 2⁶ = 1405219961 is a prime.

It is a super-2 number, since 2×1405220025² = 3949286637322001250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1405219983 and 1405220010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 850824 + ... + 852473.

It is an arithmetic number, because the mean of its divisors is an integer number (105604476).

Almost surely, 2^1405220025 is an apocalyptic number.

1405220025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1405220025 is a deficient number, since it is larger than the sum of its proper divisors (1129287399).

1405220025 is a wasteful number, since it uses less digits than its factorization.

1405220025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703321 (or 1703316 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1405220025 is about 37486.2644844748. The cubic root of 1405220025 is about 1120.0775948047.

Adding to 1405220025 its reverse (5200225041), we get a palindrome (6605445066).

The spelling of 1405220025 in words is "one billion, four hundred five million, two hundred twenty thousand, twenty-five".