1501121420 has 48 divisors (see below), whose sum is σ = 3341943360. Its totient is φ = 564424704.

The previous prime is 1501121393. The next prime is 1501121441. The reversal of 1501121420 is 241211051.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329921 + ... + 334439.

It is an arithmetic number, because the mean of its divisors is an integer number (69623820).

Almost surely, 2^1501121420 is an apocalyptic number.

1501121420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1501121420 is an abundant number, since it is smaller than the sum of its proper divisors (1840821940).

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

1501121420 is a wasteful number, since it uses less digits than its factorization.

1501121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522 (or 5520 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1501121420 is about 38744.3082271448. The cubic root of 1501121420 is about 1144.9994393697. Note that the first 3 decimals are identical.

Adding to 1501121420 its reverse (241211051), we get a palindrome (1742332471).

The spelling of 1501121420 in words is "one billion, five hundred one million, one hundred twenty-one thousand, four hundred twenty".