126021040 has 20 divisors (see below), whose sum is σ = 292999104. Its totient is φ = 50408384.

The previous prime is 126021029. The next prime is 126021061. The reversal of 126021040 is 40120621.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 787552 + ... + 787711.

Almost surely, 2^126021040 is an apocalyptic number.

126021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126021040 is an abundant number, since it is smaller than the sum of its proper divisors (166978064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126021040 is a wasteful number, since it uses less digits than its factorization.

126021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575276 (or 1575270 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 126021040 is about 11225.9093172892. The cubic root of 126021040 is about 501.3576966494.

Adding to 126021040 its reverse (40120621), we get a palindrome (166141661).

The spelling of 126021040 in words is "one hundred twenty-six million, twenty-one thousand, forty".