155121802 has 8 divisors (see below), whose sum is σ = 253835712. Its totient is φ = 70509900.

The previous prime is 155121781. The next prime is 155121803. The reversal of 155121802 is 208121551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (155121803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3525474 + ... + 3525517.

It is an arithmetic number, because the mean of its divisors is an integer number (31729464).

Almost surely, 2^155121802 is an apocalyptic number.

155121802 is a deficient number, since it is larger than the sum of its proper divisors (98713910).

155121802 is a wasteful number, since it uses less digits than its factorization.

155121802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051004.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 155121802 is about 12454.7903234057. The cubic root of 155121802 is about 537.3092044648.

The spelling of 155121802 in words is "one hundred fifty-five million, one hundred twenty-one thousand, eight hundred two".